cc: Trigger GPU rasterization based on a per-layer hint

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 <algorithm>
 #include <iterator>
 #include <map>
 #include <set>
@@ skipping 306 matching lines @@
 #endif
 
 const Experiment::Choice kNumRasterThreadsChoices[] = {
   { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
   { IDS_FLAGS_NUM_RASTER_THREADS_ONE, switches::kNumRasterThreads, "1" },
   { IDS_FLAGS_NUM_RASTER_THREADS_TWO, switches::kNumRasterThreads, "2" },
   { IDS_FLAGS_NUM_RASTER_THREADS_THREE, switches::kNumRasterThreads, "3" },
   { IDS_FLAGS_NUM_RASTER_THREADS_FOUR, switches::kNumRasterThreads, "4" }
 };
 
+const Experiment::Choice kRasterizationSiteChoices[] = {
+  { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
+  { IDS_FLAGS_CPU_RASTERIZATION,
+    cc::switches::kRasterizationSite, "cpu" },
+  { IDS_FLAGS_HYBRID_RASTERIZATION,
+    cc::switches::kRasterizationSite, "hybrid" },
+  { IDS_FLAGS_GPU_RASTERIZATION,
+    cc::switches::kRasterizationSite, "gpu" },
+};
+
 // We're using independent flags here (as opposed to a common flag with
 // different values) to be able to enable/disable the entire experience
 // associated with this feature server-side from the FieldTrial (the complete
 // experience includes other flag changes as well). It is not currently possible
 // to do that with "flag=value" flags.
 const Experiment::Choice kSearchButtonInOmniboxChoices[] = {
   { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
   { IDS_GENERIC_EXPERIMENT_CHOICE_DISABLED,
     switches::kDisableSearchButtonInOmnibox, ""},
   { IDS_FLAGS_SEARCH_BUTTON_IN_OMNIBOX_ENABLE_FOR_STR,
@@ skipping 532 matching lines @@
     IDS_FLAGS_DISABLE_SOFTWARE_RASTERIZER_NAME,
     IDS_FLAGS_DISABLE_SOFTWARE_RASTERIZER_DESCRIPTION,
 #if defined(ENABLE_SWIFTSHADER)
     kOsAll,
 #else
     0,
 #endif
     SINGLE_VALUE_TYPE(switches::kDisableSoftwareRasterizer)
   },
   {
-    "enable-gpu-rasterization",
-    IDS_FLAGS_ENABLE_GPU_RASTERIZATION_NAME,
-    IDS_FLAGS_ENABLE_GPU_RASTERIZATION_DESCRIPTION,
+    "rasterization-site",
+    IDS_FLAGS_RASTERIZATION_SITE_NAME,
+    IDS_FLAGS_RASTERIZATION_SITE_DESCRIPTION,
     kOsAndroid,
-    SINGLE_VALUE_TYPE(cc::switches::kEnableGPURasterization)
+    MULTI_VALUE_TYPE(kRasterizationSiteChoices)
   },
   {
     "enable-experimental-web-platform-features",
     IDS_FLAGS_EXPERIMENTAL_WEB_PLATFORM_FEATURES_NAME,
     IDS_FLAGS_EXPERIMENTAL_WEB_PLATFORM_FEATURES_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kEnableExperimentalWebPlatformFeatures)
   },
   {
     "disable-ntp-other-sessions-menu",
@@ skipping 1526 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags