Improving canvas 2D performance by switching graphics rendering pipeline.

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index bdfe689921952a8a5c84d7e4807350cc076cc6f6..8c476cf1ccac13602a982a0e4e39fd4a4e5e80f3 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -361,6 +361,11 @@ const char kEnableDisplayList2dCanvas[]     = "enable-display-list-2d-canvas";
 const char kForceDisplayList2dCanvas[]      = "force-display-list-2d-canvas";
 const char kDisableDisplayList2dCanvas[]    = "disable-display-list-2d-canvas";
 
+// Enables dynamic rendering pipeline switching to optimize the
+// performance of 2d canvas
+const char kEnableCanvas2dDynamicRenderingModeSwitching[] =
+    "enable-canvas-2d-dynamic-rendering-mode-switching";
+
 // Enable experimental canvas features, e.g. canvas 2D context attributes
 const char kEnableExperimentalCanvasFeatures[] =
     "enable-experimental-canvas-features";