Implement proper synchronization between HW video decode IPC and CommandBuffer.

content/renderer/pepper_plugin_delegate_impl.cc

Index: content/renderer/pepper_plugin_delegate_impl.cc
diff --git a/content/renderer/pepper_plugin_delegate_impl.cc b/content/renderer/pepper_plugin_delegate_impl.cc
index 4adc7b0fbbf5b5aafc82afd48b8143f0098d6160..087e2928d56864f7e7674a208f5d2c1c136ebf7c 100644
--- a/content/renderer/pepper_plugin_delegate_impl.cc
+++ b/content/renderer/pepper_plugin_delegate_impl.cc
@@ -829,8 +829,10 @@ webkit::ppapi::PluginDelegate::PlatformContext3D*
 webkit::ppapi::PluginDelegate::PlatformVideoDecoder*
 PepperPluginDelegateImpl::CreateVideoDecoder(
     media::VideoDecodeAccelerator::Client* client,
-    int command_buffer_route_id) {
-  return new PlatformVideoDecoderImpl(client, command_buffer_route_id);
+    int32 command_buffer_route_id,
+    gpu::CommandBufferHelper* cmd_buffer_helper) {
+  return new PlatformVideoDecoderImpl(
+      client, command_buffer_route_id, cmd_buffer_helper);
 }
 
 void PepperPluginDelegateImpl::NumberOfFindResultsChanged(int identifier,