Using experiments to activate the DisplayList2DCanvas optimization

chrome/browser/about_flags.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 121 matching lines @@
   first = std::find(cmdline.argv().begin(), cmdline.argv().end(),
                     GetSwitchString(chromeos::switches::kPolicySwitchesBegin));
   last = std::find(cmdline.argv().begin(), cmdline.argv().end(),
                    GetSwitchString(chromeos::switches::kPolicySwitchesEnd));
   if (first != cmdline.argv().end() && last != cmdline.argv().end())
     flags.insert(first + 1, last);
 #endif
   return flags;
 }
 
+const Experiment::Choice kEnableDisplayList2DcanvasChoices[] = {
+  { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
+  { IDS_GENERIC_EXPERIMENT_CHOICE_ENABLED,
+    switches::kEnableDisplayList2dCanvas, ""},
+  { IDS_GENERIC_EXPERIMENT_CHOICE_DISABLED,
+    switches::kDisableDisplayList2dCanvas, ""},
+};
+
 const Experiment::Choice kEnableCompositingForTransitionChoices[] = {
   { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
   { IDS_GENERIC_EXPERIMENT_CHOICE_ENABLED,
     switches::kEnableCompositingForTransition, ""},
   { IDS_GENERIC_EXPERIMENT_CHOICE_DISABLED,
     switches::kDisableCompositingForTransition, ""},
 };
 
 const Experiment::Choice kTouchEventsChoices[] = {
   { IDS_GENERIC_EXPERIMENT_CHOICE_AUTOMATIC, "", "" },
@@ skipping 417 matching lines @@
     IDS_FLAGS_DISABLE_ACCELERATED_2D_CANVAS_NAME,
     IDS_FLAGS_DISABLE_ACCELERATED_2D_CANVAS_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kDisableAccelerated2dCanvas)
   },
   {
     "enable-display-list-2d-canvas",
     IDS_FLAGS_ENABLE_DISPLAY_LIST_2D_CANVAS_NAME,
     IDS_FLAGS_ENABLE_DISPLAY_LIST_2D_CANVAS_DESCRIPTION,
     kOsAll,
-    SINGLE_VALUE_TYPE(switches::kEnableDisplayList2dCanvas)
+    MULTI_VALUE_TYPE(kEnableDisplayList2DcanvasChoices)
   },
   {
     "composited-layer-borders",
     IDS_FLAGS_COMPOSITED_LAYER_BORDERS,
     IDS_FLAGS_COMPOSITED_LAYER_BORDERS_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(cc::switches::kShowCompositedLayerBorders)
   },
   {
     "show-fps-counter",
@@ skipping 1896 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags