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 #ifndef CHROME_BROWSER_PRERENDER_PRERENDER_ORIGIN_H_ 6 #define CHROME_BROWSER_PRERENDER_PRERENDER_ORIGIN_H_ 7 8 namespace prerender { 9 10 // Origin indicates what caused the prerender. 11 // NOTE: New values need to be appended, since they are used in histograms. 12 enum Origin { 13 // Obsolete: ORIGIN_LINK_REL_PRERENDER = 0, 14 // Obsolete: ORIGIN_OMNIBOX_ORIGINAL = 1, 15 ORIGIN_GWS_PRERENDER = 2, 16 // Obsolete: ORIGIN_OMNIBOX_CONSERVATIVE = 3, 17 // Obsolete: ORIGIN_OMNIBOX_EXACT = 4, 18 ORIGIN_OMNIBOX = 5, 19 ORIGIN_NONE = 6, 20 ORIGIN_LINK_REL_PRERENDER_SAMEDOMAIN = 7, 21 ORIGIN_LINK_REL_PRERENDER_CROSSDOMAIN = 8, 22 ORIGIN_LOCAL_PREDICTOR = 9, 23 ORIGIN_EXTERNAL_REQUEST = 10, 24 ORIGIN_INSTANT = 11, 25 ORIGIN_LINK_REL_NEXT = 12, 26 ORIGIN_MAX, 27 }; 28 29 // Return a human-readable name for |origin|. 30 const char* NameFromOrigin(Origin origin); 31 32 } // namespace prerender 33 34 #endif // CHROME_BROWSER_PRERENDER_PRERENDER_ORIGIN_H_ 35