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

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index ad0e6cd7c64506f591b6d7a8e5b82aa488f3a795..5fc3c2bb65c104450ce23a107bc060a4bee8422f 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -324,6 +324,16 @@ const Experiment::Choice kNumRasterThreadsChoices[] = {
   { 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
@@ -876,11 +886,11 @@ const Experiment kExperiments[] = {
     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",