Add runtime flag to enable the display list 2D canvas implementation

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 556 matching lines @@
     SINGLE_VALUE_TYPE(switches::kEnableExperimentalCanvasFeatures)
   },
   {
     "disable-accelerated-2d-canvas",
     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)
+  },
+  {
     "composited-layer-borders",
     IDS_FLAGS_COMPOSITED_LAYER_BORDERS,
     IDS_FLAGS_COMPOSITED_LAYER_BORDERS_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(cc::switches::kShowCompositedLayerBorders)
   },
   {
     "show-fps-counter",
     IDS_FLAGS_SHOW_FPS_COUNTER,
     IDS_FLAGS_SHOW_FPS_COUNTER_DESCRIPTION,
@@ skipping 1873 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags