chrome/browser/prerender/prerender_origin.h

   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_