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1 /*
2  * Copyright (C) 2009 Google Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are
6  * met:
7  *
8  *     * Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *     * Redistributions in binary form must reproduce the above
11  * copyright notice, this list of conditions and the following disclaimer
12  * in the documentation and/or other materials provided with the
13  * distribution.
14  *     * Neither the name of Google Inc. nor the names of its
15  * contributors may be used to endorse or promote products derived from
16  * this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #ifndef WebFrameImpl_h
32 #define WebFrameImpl_h
33 
34 #include "WebFrame.h"
35 
36 #include "FrameLoaderClientImpl.h"
37 #include "core/frame/Frame.h"
38 #include "core/frame/FrameDestructionObserver.h"
39 #include "platform/geometry/FloatRect.h"
40 #include "public/platform/WebFileSystemType.h"
41 #include "wtf/Compiler.h"
42 #include "wtf/OwnPtr.h"
43 #include "wtf/RefCounted.h"
44 #include "wtf/text/WTFString.h"
45 
46 namespace WebCore {
47 class GraphicsContext;
48 class HTMLInputElement;
49 class HistoryItem;
50 class IntSize;
51 class KURL;
52 class Node;
53 class Range;
54 class SubstituteData;
55 struct FrameLoadRequest;
56 struct WindowFeatures;
57 }
58 
59 namespace blink {
60 class ChromePrintContext;
61 class WebDataSourceImpl;
62 class WebInputElement;
63 class WebFrameClient;
64 class WebPerformance;
65 class WebPluginContainerImpl;
66 class WebView;
67 class WebViewImpl;
68 struct WebPrintParams;
69 
70 template <typename T> class WebVector;
71 
72 // Implementation of WebFrame, note that this is a reference counted object.
73 class WebFrameImpl
74     : public WebFrame
75     , public RefCounted<WebFrameImpl>
76     , public WebCore::FrameDestructionObserver {
77 public:
78     // WebFrame methods:
79     virtual void close();
80     virtual WebString uniqueName() const;
81     virtual WebString assignedName() const;
82     virtual void setName(const WebString&);
83     virtual long long embedderIdentifier() const;
84     virtual WebVector<WebIconURL> iconURLs(int iconTypesMask) const;
85     virtual void setRemoteWebLayer(WebLayer*);
86     virtual void setPermissionClient(WebPermissionClient*);
87     virtual WebSize scrollOffset() const;
88     virtual void setScrollOffset(const WebSize&);
89     virtual WebSize minimumScrollOffset() const;
90     virtual WebSize maximumScrollOffset() const;
91     virtual WebSize contentsSize() const;
92     virtual bool hasVisibleContent() const;
93     virtual WebRect visibleContentRect() const;
94     virtual bool hasHorizontalScrollbar() const;
95     virtual bool hasVerticalScrollbar() const;
96     virtual WebView* view() const;
97     virtual WebFrame* opener() const;
98     virtual void setOpener(const WebFrame*);
99     virtual WebFrame* parent() const;
100     virtual WebFrame* top() const;
101     virtual WebFrame* firstChild() const;
102     virtual WebFrame* lastChild() const;
103     virtual WebFrame* nextSibling() const;
104     virtual WebFrame* previousSibling() const;
105     virtual WebFrame* traverseNext(bool wrap) const;
106     virtual WebFrame* traversePrevious(bool wrap) const;
107     virtual WebFrame* findChildByName(const WebString&) const;
108     virtual WebFrame* findChildByExpression(const WebString&) const;
109     virtual WebDocument document() const;
110     virtual WebPerformance performance() const;
111     virtual NPObject* windowObject() const;
112     virtual void bindToWindowObject(const WebString& name, NPObject*);
113     virtual void bindToWindowObject(const WebString& name, NPObject*, void*);
114     virtual void executeScript(const WebScriptSource&);
115     virtual void executeScriptInIsolatedWorld(
116         int worldID, const WebScriptSource* sources, unsigned numSources,
117         int extensionGroup);
118     virtual void setIsolatedWorldSecurityOrigin(int worldID, const WebSecurityOrigin&);
119     virtual void setIsolatedWorldContentSecurityPolicy(int worldID, const WebString&);
120     virtual void addMessageToConsole(const WebConsoleMessage&);
121     virtual void collectGarbage();
122     virtual bool checkIfRunInsecureContent(const WebURL&) const;
123     virtual v8::Handle<v8::Value> executeScriptAndReturnValue(
124         const WebScriptSource&);
125     virtual void executeScriptInIsolatedWorld(
126         int worldID, const WebScriptSource* sourcesIn, unsigned numSources,
127         int extensionGroup, WebVector<v8::Local<v8::Value> >* results);
128     virtual v8::Handle<v8::Value> callFunctionEvenIfScriptDisabled(
129         v8::Handle<v8::Function>,
130         v8::Handle<v8::Object>,
131         int argc,
132         v8::Handle<v8::Value> argv[]);
133     virtual v8::Local<v8::Context> mainWorldScriptContext() const;
134     virtual v8::Handle<v8::Value> createFileSystem(WebFileSystemType,
135         const WebString& name,
136         const WebString& path);
137     virtual v8::Handle<v8::Value> createSerializableFileSystem(WebFileSystemType,
138         const WebString& name,
139         const WebString& path);
140     virtual v8::Handle<v8::Value> createFileEntry(WebFileSystemType,
141         const WebString& fileSystemName,
142         const WebString& fileSystemPath,
143         const WebString& filePath,
144         bool isDirectory);
145     virtual void reload(bool ignoreCache);
146     virtual void reloadWithOverrideURL(const WebURL& overrideUrl, bool ignoreCache);
147     virtual void loadRequest(const WebURLRequest&);
148     virtual void loadHistoryItem(const WebHistoryItem&);
149     virtual void loadData(
150         const WebData&, const WebString& mimeType, const WebString& textEncoding,
151         const WebURL& baseURL, const WebURL& unreachableURL, bool replace);
152     virtual void loadHTMLString(
153         const WebData& html, const WebURL& baseURL, const WebURL& unreachableURL,
154         bool replace);
155     virtual bool isLoading() const;
156     virtual void stopLoading();
157     virtual WebDataSource* provisionalDataSource() const;
158     virtual WebDataSource* dataSource() const;
159     virtual WebHistoryItem previousHistoryItem() const;
160     virtual WebHistoryItem currentHistoryItem() const;
161     virtual void enableViewSourceMode(bool enable);
162     virtual bool isViewSourceModeEnabled() const;
163     virtual void setReferrerForRequest(WebURLRequest&, const WebURL& referrer);
164     virtual void dispatchWillSendRequest(WebURLRequest&);
165     virtual WebURLLoader* createAssociatedURLLoader(const WebURLLoaderOptions&);
166     virtual unsigned unloadListenerCount() const;
167     virtual void replaceSelection(const WebString&);
168     virtual void insertText(const WebString&);
169     virtual void setMarkedText(const WebString&, unsigned location, unsigned length);
170     virtual void unmarkText();
171     virtual bool hasMarkedText() const;
172     virtual WebRange markedRange() const;
173     virtual bool firstRectForCharacterRange(unsigned location, unsigned length, WebRect&) const;
174     virtual size_t characterIndexForPoint(const WebPoint&) const;
175     virtual bool executeCommand(const WebString&, const WebNode& = WebNode());
176     virtual bool executeCommand(const WebString&, const WebString& value, const WebNode& = WebNode());
177     virtual bool isCommandEnabled(const WebString&) const;
178     virtual void enableContinuousSpellChecking(bool);
179     virtual bool isContinuousSpellCheckingEnabled() const;
180     virtual void requestTextChecking(const WebElement&);
181     virtual void replaceMisspelledRange(const WebString&);
182     virtual void removeSpellingMarkers();
183     virtual bool hasSelection() const;
184     virtual WebRange selectionRange() const;
185     virtual WebString selectionAsText() const;
186     virtual WebString selectionAsMarkup() const;
187     virtual bool selectWordAroundCaret();
188     virtual void selectRange(const WebPoint& base, const WebPoint& extent);
189     virtual void selectRange(const WebRange&);
190     virtual void moveRangeSelection(const WebPoint& base, const WebPoint& extent);
191     virtual void moveCaretSelection(const WebPoint&);
192     virtual void setCaretVisible(bool);
193     virtual int printBegin(const WebPrintParams&, const WebNode& constrainToNode);
194     virtual float printPage(int pageToPrint, WebCanvas*);
195     virtual float getPrintPageShrink(int page);
196     virtual void printEnd();
197     virtual bool isPrintScalingDisabledForPlugin(const WebNode&);
198     virtual bool hasCustomPageSizeStyle(int pageIndex);
199     virtual bool isPageBoxVisible(int pageIndex);
200     virtual void pageSizeAndMarginsInPixels(int pageIndex,
201                                             WebSize& pageSize,
202                                             int& marginTop,
203                                             int& marginRight,
204                                             int& marginBottom,
205                                             int& marginLeft);
206     virtual WebString pageProperty(const WebString& propertyName, int pageIndex);
207     virtual void printPagesWithBoundaries(WebCanvas*, const WebSize&);
208     virtual bool find(
209         int identifier, const WebString& searchText, const WebFindOptions&,
210         bool wrapWithinFrame, WebRect* selectionRect);
211     virtual void stopFinding(bool clearSelection);
212     virtual void scopeStringMatches(
213         int identifier, const WebString& searchText, const WebFindOptions&,
214         bool reset);
215     virtual void cancelPendingScopingEffort();
216     virtual void increaseMatchCount(int count, int identifier);
217     virtual void resetMatchCount();
218     virtual int findMatchMarkersVersion() const;
219     virtual WebFloatRect activeFindMatchRect();
220     virtual void findMatchRects(WebVector<WebFloatRect>&);
221     virtual int selectNearestFindMatch(const WebFloatPoint&, WebRect* selectionRect);
222 
223     virtual void sendOrientationChangeEvent(int orientation);
224 
225     virtual void dispatchMessageEventWithOriginCheck(
226         const WebSecurityOrigin& intendedTargetOrigin,
227         const WebDOMEvent&);
228 
229     virtual WebString contentAsText(size_t maxChars) const;
230     virtual WebString contentAsMarkup() const;
231     virtual WebString renderTreeAsText(RenderAsTextControls toShow = RenderAsTextNormal) const;
232     virtual WebString markerTextForListItem(const WebElement&) const;
233     virtual WebRect selectionBoundsRect() const;
234 
235     virtual bool selectionStartHasSpellingMarkerFor(int from, int length) const;
236     virtual WebString layerTreeAsText(bool showDebugInfo = false) const;
237 
238     // WebCore::FrameDestructionObserver methods.
239     virtual void willDetachPage();
240 
241     static WebFrameImpl* create(WebFrameClient*);
242     // FIXME: Move the embedderIdentifier concept fully to the embedder and
243     // remove this factory method.
244     static WebFrameImpl* create(WebFrameClient*, long long embedderIdentifier);
245     virtual ~WebFrameImpl();
246 
247     // Called by the WebViewImpl to initialize the main frame for the page.
248     void initializeAsMainFrame(WebCore::Page*);
249 
250     PassRefPtr<WebCore::Frame> createChildFrame(
251         const WebCore::FrameLoadRequest&, WebCore::HTMLFrameOwnerElement*);
252 
253     void didChangeContentsSize(const WebCore::IntSize&);
254 
255     void createFrameView();
256 
257     static WebFrameImpl* fromFrame(WebCore::Frame* frame);
258     static WebFrameImpl* fromFrameOwnerElement(WebCore::Element* element);
259 
260     // If the frame hosts a PluginDocument, this method returns the WebPluginContainerImpl
261     // that hosts the plugin.
262     static WebPluginContainerImpl* pluginContainerFromFrame(WebCore::Frame*);
263 
264     // If the frame hosts a PluginDocument, this method returns the WebPluginContainerImpl
265     // that hosts the plugin. If the provided node is a plugin, then it runs its
266     // WebPluginContainerImpl.
267     static WebPluginContainerImpl* pluginContainerFromNode(WebCore::Frame*, const WebNode&);
268 
269     WebViewImpl* viewImpl() const;
270 
frameView()271     WebCore::FrameView* frameView() const { return frame() ? frame()->view() : 0; }
272 
273     // Getters for the impls corresponding to Get(Provisional)DataSource. They
274     // may return 0 if there is no corresponding data source.
275     WebDataSourceImpl* dataSourceImpl() const;
276     WebDataSourceImpl* provisionalDataSourceImpl() const;
277 
278     // Returns which frame has an active match. This function should only be
279     // called on the main frame, as it is the only frame keeping track. Returned
280     // value can be 0 if no frame has an active match.
activeMatchFrame()281     WebFrameImpl* activeMatchFrame() const { return m_currentActiveMatchFrame; }
282 
283     // Returns the active match in the current frame. Could be a null range if
284     // the local frame has no active match.
activeMatch()285     WebCore::Range* activeMatch() const { return m_activeMatch.get(); }
286 
287     // When a Find operation ends, we want to set the selection to what was active
288     // and set focus to the first focusable node we find (starting with the first
289     // node in the matched range and going up the inheritance chain). If we find
290     // nothing to focus we focus the first focusable node in the range. This
291     // allows us to set focus to a link (when we find text inside a link), which
292     // allows us to navigate by pressing Enter after closing the Find box.
293     void setFindEndstateFocusAndSelection();
294 
295     void didFail(const WebCore::ResourceError&, bool wasProvisional);
296 
297     // Sets whether the WebFrameImpl allows its document to be scrolled.
298     // If the parameter is true, allow the document to be scrolled.
299     // Otherwise, disallow scrolling.
300     void setCanHaveScrollbars(bool);
301 
client()302     WebFrameClient* client() const { return m_client; }
setClient(WebFrameClient * client)303     void setClient(WebFrameClient* client) { m_client = client; }
304 
permissionClient()305     WebPermissionClient* permissionClient() { return m_permissionClient; }
306 
307     void setInputEventsTransformForEmulation(const WebCore::IntSize&, float);
308 
309     static void selectWordAroundPosition(WebCore::Frame*, WebCore::VisiblePosition);
310 
311 private:
312     class DeferredScopeStringMatches;
313     friend class DeferredScopeStringMatches;
314     friend class FrameLoaderClientImpl;
315 
316     struct FindMatch {
317         RefPtr<WebCore::Range> m_range;
318 
319         // 1-based index within this frame.
320         int m_ordinal;
321 
322         // In find-in-page coordinates.
323         // Lazily calculated by updateFindMatchRects.
324         WebCore::FloatRect m_rect;
325 
326         FindMatch(PassRefPtr<WebCore::Range>, int ordinal);
327     };
328 
329     // A bit mask specifying area of the frame to invalidate.
330     enum AreaToInvalidate {
331       InvalidateNothing,
332       InvalidateContentArea,
333       InvalidateScrollbar,   // Vertical scrollbar only.
334       InvalidateAll          // Both content area and the scrollbar.
335     };
336 
337     WebFrameImpl(WebFrameClient*, long long frame_identifier);
338 
339     // Sets the local WebCore frame and registers destruction observers.
340     void setWebCoreFrame(WebCore::Frame*);
341 
342     // Notifies the delegate about a new selection rect.
343     void reportFindInPageSelection(
344         const WebRect& selectionRect, int activeMatchOrdinal, int identifier);
345 
346     // Clear the find-in-page matches cache forcing rects to be fully
347     // calculated again next time updateFindMatchRects is called.
348     void clearFindMatchesCache();
349 
350     // Check if the activeMatchFrame still exists in the frame tree.
351     bool isActiveMatchFrameValid() const;
352 
353     // Return the index in the find-in-page cache of the match closest to the
354     // provided point in find-in-page coordinates, or -1 in case of error.
355     // The squared distance to the closest match is returned in the distanceSquared parameter.
356     int nearestFindMatch(const WebCore::FloatPoint&, float& distanceSquared);
357 
358     // Select a find-in-page match marker in the current frame using a cache
359     // match index returned by nearestFindMatch. Returns the ordinal of the new
360     // selected match or -1 in case of error. Also provides the bounding box of
361     // the marker in window coordinates if selectionRect is not null.
362     int selectFindMatch(unsigned index, WebRect* selectionRect);
363 
364     // Compute and cache the rects for FindMatches if required.
365     // Rects are automatically invalidated in case of content size changes,
366     // propagating the invalidation to child frames.
367     void updateFindMatchRects();
368 
369     // Append the find-in-page match rects of the current frame to the provided vector.
370     void appendFindMatchRects(Vector<WebFloatRect>& frameRects);
371 
372     // Invalidates a certain area within the frame.
373     void invalidateArea(AreaToInvalidate);
374 
375     // Add a WebKit TextMatch-highlight marker to nodes in a range.
376     void addMarker(WebCore::Range*, bool activeMatch);
377 
378     // Sets the markers within a range as active or inactive.
379     void setMarkerActive(WebCore::Range*, bool active);
380 
381     // Returns the ordinal of the first match in the frame specified. This
382     // function enumerates the frames, starting with the main frame and up to (but
383     // not including) the frame passed in as a parameter and counts how many
384     // matches have been found.
385     int ordinalOfFirstMatchForFrame(WebFrameImpl*) const;
386 
387     // Determines whether the scoping effort is required for a particular frame.
388     // It is not necessary if the frame is invisible, for example, or if this
389     // is a repeat search that already returned nothing last time the same prefix
390     // was searched.
391     bool shouldScopeMatches(const WTF::String& searchText);
392 
393     // Removes the current frame from the global scoping effort and triggers any
394     // updates if appropriate. This method does not mark the scoping operation
395     // as finished.
396     void flushCurrentScopingEffort(int identifier);
397 
398     // Finishes the current scoping effort and triggers any updates if appropriate.
399     void finishCurrentScopingEffort(int identifier);
400 
401     // Queue up a deferred call to scopeStringMatches.
402     void scopeStringMatchesSoon(
403         int identifier, const WebString& searchText, const WebFindOptions&,
404         bool reset);
405 
406     // Called by a DeferredScopeStringMatches instance.
407     void callScopeStringMatches(
408         DeferredScopeStringMatches*, int identifier, const WebString& searchText,
409         const WebFindOptions&, bool reset);
410 
411     // Determines whether to invalidate the content area and scrollbar.
412     void invalidateIfNecessary();
413 
414     void loadJavaScriptURL(const WebCore::KURL&);
415 
416     // Returns a hit-tested VisiblePosition for the given point
417     WebCore::VisiblePosition visiblePositionForWindowPoint(const WebPoint&);
418 
419     class WebFrameInit : public WebCore::FrameInit {
420     public:
create(WebFrameImpl * webFrameImpl,int64_t frameID)421         static PassRefPtr<WebFrameInit> create(WebFrameImpl* webFrameImpl, int64_t frameID)
422         {
423             return adoptRef(new WebFrameInit(webFrameImpl, frameID));
424         }
425 
426     private:
WebFrameInit(WebFrameImpl * webFrameImpl,int64_t frameID)427         WebFrameInit(WebFrameImpl* webFrameImpl, int64_t frameID)
428             : WebCore::FrameInit(frameID)
429             , m_frameLoaderClientImpl(webFrameImpl)
430         {
431             setFrameLoaderClient(&m_frameLoaderClientImpl);
432         }
433 
434         FrameLoaderClientImpl m_frameLoaderClientImpl;
435     };
436     RefPtr<WebFrameInit> m_frameInit;
437 
438     WebFrameClient* m_client;
439     WebPermissionClient* m_permissionClient;
440 
441     // A way for the main frame to keep track of which frame has an active
442     // match. Should be 0 for all other frames.
443     WebFrameImpl* m_currentActiveMatchFrame;
444 
445     // The range of the active match for the current frame.
446     RefPtr<WebCore::Range> m_activeMatch;
447 
448     // The index of the active match for the current frame.
449     int m_activeMatchIndexInCurrentFrame;
450 
451     // This flag is used by the scoping effort to determine if we need to figure
452     // out which rectangle is the active match. Once we find the active
453     // rectangle we clear this flag.
454     bool m_locatingActiveRect;
455 
456     // The scoping effort can time out and we need to keep track of where we
457     // ended our last search so we can continue from where we left of.
458     RefPtr<WebCore::Range> m_resumeScopingFromRange;
459 
460     // Keeps track of the last string this frame searched for. This is used for
461     // short-circuiting searches in the following scenarios: When a frame has
462     // been searched and returned 0 results, we don't need to search that frame
463     // again if the user is just adding to the search (making it more specific).
464     WTF::String m_lastSearchString;
465 
466     // Keeps track of how many matches this frame has found so far, so that we
467     // don't loose count between scoping efforts, and is also used (in conjunction
468     // with m_lastSearchString) to figure out if we need to search the frame again.
469     int m_lastMatchCount;
470 
471     // This variable keeps a cumulative total of matches found so far for ALL the
472     // frames on the page, and is only incremented by calling IncreaseMatchCount
473     // (on the main frame only). It should be -1 for all other frames.
474     int m_totalMatchCount;
475 
476     // This variable keeps a cumulative total of how many frames are currently
477     // scoping, and is incremented/decremented on the main frame only.
478     // It should be -1 for all other frames.
479     int m_framesScopingCount;
480 
481     // Identifier of the latest find-in-page request. Required to be stored in
482     // the frame in order to reply if required in case the frame is detached.
483     int m_findRequestIdentifier;
484 
485     // Keeps track of whether there is an scoping effort ongoing in the frame.
486     bool m_scopingInProgress;
487 
488     // Keeps track of whether the last find request completed its scoping effort
489     // without finding any matches in this frame.
490     bool m_lastFindRequestCompletedWithNoMatches;
491 
492     // Keeps track of when the scoping effort should next invalidate the scrollbar
493     // and the frame area.
494     int m_nextInvalidateAfter;
495 
496     // A list of all of the pending calls to scopeStringMatches.
497     Vector<DeferredScopeStringMatches*> m_deferredScopingWork;
498 
499     // Version number incremented on the main frame only whenever the document
500     // find-in-page match markers change. It should be 0 for all other frames.
501     int m_findMatchMarkersVersion;
502 
503     // Local cache of the find match markers currently displayed for this frame.
504     Vector<FindMatch> m_findMatchesCache;
505 
506     // Determines if the rects in the find-in-page matches cache of this frame
507     // are invalid and should be recomputed.
508     bool m_findMatchRectsAreValid;
509 
510     // Contents size when find-in-page match rects were last computed for this
511     // frame's cache.
512     WebCore::IntSize m_contentsSizeForCurrentFindMatchRects;
513 
514     // Valid between calls to BeginPrint() and EndPrint(). Containts the print
515     // information. Is used by PrintPage().
516     OwnPtr<ChromePrintContext> m_printContext;
517 
518     // Stores the additional input events offset and scale when device metrics emulation is enabled.
519     WebCore::IntSize m_inputEventsOffsetForEmulation;
520     float m_inputEventsScaleFactorForEmulation;
521 };
522 
toWebFrameImpl(WebFrame * webFrame)523 inline WebFrameImpl* toWebFrameImpl(WebFrame* webFrame)
524 {
525     return static_cast<WebFrameImpl*>(webFrame);
526 }
527 
toWebFrameImpl(const WebFrame * webFrame)528 inline const WebFrameImpl* toWebFrameImpl(const WebFrame* webFrame)
529 {
530     return static_cast<const WebFrameImpl*>(webFrame);
531 }
532 
533 // This will catch anyone doing an unnecessary cast.
534 void toWebFrameImpl(const WebFrameImpl*);
535 
536 } // namespace blink
537 
538 #endif
539