Unified BeginFrame scheduling

cc/base/switches.cc

Index: cc/base/switches.cc
diff --git a/cc/base/switches.cc b/cc/base/switches.cc
index 13904cdba36c95d2c2f8cbec822a721a727f1817..07b11df9e4bbb9f365090390d210dd34941b03f8 100644
--- a/cc/base/switches.cc
+++ b/cc/base/switches.cc
@@ -71,6 +71,9 @@ const char kUIDisablePartialSwap[] = "ui-disable-partial-swap";
 // Enables the GPU benchmarking extension
 const char kEnableGpuBenchmarking[] = "enable-gpu-benchmarking";
 
+// Use a BeginFrame signal from browser to renderer to schedule rendering.
+const char kEnableBeginFrameScheduling[] = "enable-begin-frame-scheduling";
+
 // Renders a border around compositor layers to help debug and study
 // layer compositing.
 const char kShowCompositedLayerBorders[] = "show-composited-layer-borders";