Use MSAA in GPU rasterization if Skia suggests it

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 96b086fdd8059330639a436b2c12aaf98965c0a8..8562e61b6603bb23a180c6cbde4cfb5258e4678e 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -372,6 +372,19 @@ const Experiment::Choice kNotificationCenterTrayBehaviorChoices[] = {
     message_center::switches::kNotificationCenterTrayBehavior, "unread" }
 };
 
+const Experiment::Choice kEnableGPURasterizationChoices[] = {
+    {IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", ""},
+    {IDS_GENERIC_EXPERIMENT_CHOICE_ENABLED,
+     cc::switches::kEnableGPURasterization, ""},
+    {IDS_GENERIC_EXPERIMENT_CHOICE_DISABLED,
+     cc::switches::kDisableGPURasterization, ""},
+    {IDS_FLAGS_ENABLE_GPU_RASTERIZATION_GPU,
+     cc::switches::kEnableGPURasterization, "gpu"},
+    {IDS_FLAGS_ENABLE_GPU_RASTERIZATION_MSAA4,
+     cc::switches::kEnableGPURasterization, "msaa4"},
+    {IDS_FLAGS_ENABLE_GPU_RASTERIZATION_MSAA16,
+     cc::switches::kEnableGPURasterization, "msaa16"}};
+
 // RECORDING USER METRICS FOR FLAGS:
 // -----------------------------------------------------------------------------
 // The first line of the experiment is the internal name. If you'd like to
@@ -887,7 +900,7 @@ const Experiment kExperiments[] = {
     IDS_FLAGS_ENABLE_GPU_RASTERIZATION_NAME,
     IDS_FLAGS_ENABLE_GPU_RASTERIZATION_DESCRIPTION,
     kOsAll,
-    SINGLE_VALUE_TYPE(cc::switches::kEnableGPURasterization)
+    MULTI_VALUE_TYPE(kEnableGPURasterizationChoices)
   },
   {
     "enable-experimental-web-platform-features",