Improving canvas 2D performance by switching graphics rendering pipeline.

content/child/runtime_features.cc

Index: content/child/runtime_features.cc
diff --git a/content/child/runtime_features.cc b/content/child/runtime_features.cc
index 9c508f7ed36c0e24cf2d06a1f75996176c8462f2..6ac408e4301350a2a2873a2a946807fa93a6f2db 100644
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -106,6 +106,10 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
   if (command_line.HasSwitch(switches::kForceDisplayList2dCanvas))
     WebRuntimeFeatures::forceDisplayList2dCanvas(true);
 
+  if (command_line.HasSwitch(
+      switches::kEnableCanvas2dDynamicRenderingModeSwitching))
+    WebRuntimeFeatures::enableCanvas2dDynamicRenderingModeSwitching(true);
+
   if (command_line.HasSwitch(switches::kEnableWebGLDraftExtensions))
     WebRuntimeFeatures::enableWebGLDraftExtensions(true);