Implement proper synchronization between HW video decode IPC and CommandBuffer.

webkit/plugins/ppapi/plugin_delegate.h

Index: webkit/plugins/ppapi/plugin_delegate.h
diff --git a/webkit/plugins/ppapi/plugin_delegate.h b/webkit/plugins/ppapi/plugin_delegate.h
index c72eaaaf2e5d98cbcfc4d97174e1a8bf328c1600..dae68a86648f93f9fdf98b9e0d298852e440687b 100644
--- a/webkit/plugins/ppapi/plugin_delegate.h
+++ b/webkit/plugins/ppapi/plugin_delegate.h
@@ -46,6 +46,7 @@ class Rect;
 
 namespace gpu {
 class CommandBuffer;
+class CommandBufferHelper;
 }
 
 namespace ppapi {
@@ -263,7 +264,8 @@ class PluginDelegate {
   // The caller will own the pointer returned from this.
   virtual PlatformVideoDecoder* CreateVideoDecoder(
       media::VideoDecodeAccelerator::Client* client,
-      int command_buffer_route_id) = 0;
+      int32 command_buffer_route_id,
+      gpu::CommandBufferHelper* cmd_buffer_helper) = 0;
 
   // The caller is responsible for calling Shutdown() on the returned pointer
   // to clean up the corresponding resources allocated during this call.