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 COMPONENTS_NO_STATE_PREFETCH_COMMON_PRERENDER_ORIGIN_H_ 6 #define COMPONENTS_NO_STATE_PREFETCH_COMMON_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 13 // These values are persisted to logs. Entries should not be renumbered and 14 // numeric values should never be reused. The values should remain 15 // synchronized with the enum PrerenderOrigin in 16 // //tools/metrics/histograms/enums.xml. 17 enum Origin { 18 // Obsolete: ORIGIN_LINK_REL_PRERENDER = 0, 19 // Obsolete: ORIGIN_OMNIBOX_ORIGINAL = 1, 20 ORIGIN_GWS_PRERENDER = 2, 21 // Obsolete: ORIGIN_OMNIBOX_CONSERVATIVE = 3, 22 // Obsolete: ORIGIN_OMNIBOX_EXACT = 4, 23 ORIGIN_OMNIBOX = 5, 24 ORIGIN_NONE = 6, 25 ORIGIN_LINK_REL_PRERENDER_SAMEDOMAIN = 7, 26 ORIGIN_LINK_REL_PRERENDER_CROSSDOMAIN = 8, 27 // Obsolete: ORIGIN_LOCAL_PREDICTOR = 9, 28 ORIGIN_EXTERNAL_REQUEST = 10, 29 // Obsolete: ORIGIN_INSTANT = 11, 30 ORIGIN_LINK_REL_NEXT = 12, 31 ORIGIN_EXTERNAL_REQUEST_FORCED_PRERENDER = 13, 32 // Obsolete: ORIGIN_OFFLINE = 14, 33 ORIGIN_NAVIGATION_PREDICTOR = 15, 34 ORIGIN_ISOLATED_PRERENDER = 16, 35 ORIGIN_MAX = 17, 36 }; 37 38 // Return a human-readable name for |origin|. 39 const char* NameFromOrigin(Origin origin); 40 41 } // namespace prerender 42 43 #endif // COMPONENTS_NO_STATE_PREFETCH_COMMON_PRERENDER_ORIGIN_H_ 44