1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "chrome/browser/tab_contents/tab_util.h"
6
7 #include "chrome/browser/extensions/extension_service.h"
8 #include "chrome/browser/profiles/profile.h"
9 #include "chrome/browser/ui/webui/chrome_web_ui_controller_factory.h"
10 #include "chrome/common/chrome_switches.h"
11 #include "content/public/browser/render_view_host.h"
12 #include "content/public/browser/site_instance.h"
13 #include "content/public/browser/web_contents.h"
14 #include "url/gurl.h"
15
16 using content::RenderViewHost;
17 using content::SiteInstance;
18 using content::WebContents;
19
20 namespace tab_util {
21
GetWebContentsByID(int render_process_id,int render_view_id)22 content::WebContents* GetWebContentsByID(int render_process_id,
23 int render_view_id) {
24 RenderViewHost* render_view_host =
25 RenderViewHost::FromID(render_process_id, render_view_id);
26 if (!render_view_host)
27 return NULL;
28
29 return WebContents::FromRenderViewHost(render_view_host);
30 }
31
GetSiteInstanceForNewTab(Profile * profile,const GURL & url)32 SiteInstance* GetSiteInstanceForNewTab(Profile* profile,
33 const GURL& url) {
34 // If |url| is a WebUI or extension, we set the SiteInstance up front so that
35 // we don't end up with an extra process swap on the first navigation.
36 ExtensionService* service = profile->GetExtensionService();
37 if (ChromeWebUIControllerFactory::GetInstance()->UseWebUIForURL(
38 profile, url) ||
39 (service &&
40 service->extensions()->GetHostedAppByURL(url))) {
41 return SiteInstance::CreateForURL(profile, url);
42 }
43
44 // We used to share the SiteInstance for same-site links opened in new tabs,
45 // to leverage the in-memory cache and reduce process creation. It now
46 // appears that it is more useful to have such links open in a new process,
47 // so we create new tabs in a new BrowsingInstance.
48 return NULL;
49 }
50
51 } // namespace tab_util
52