Make WaitSyncPoint go through command buffers.

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 09f73aee94f32aa45a0e990f5aedf5cad4f5d7df..c8698ecb03f22ea63d0d9e1708484f2464b3ee7f 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -558,6 +558,8 @@ class GLES2DecoderImpl : public GLES2Decoder {
       const base::Callback<void(gfx::Size)>& callback) OVERRIDE;
 
   virtual void SetMsgCallback(const MsgCallback& callback) OVERRIDE;
+  virtual void SetWaitSyncPointCallback(
+      const WaitSyncPointCallback& callback) OVERRIDE;
 
   virtual void SetStreamTextureManager(StreamTextureManager* manager) OVERRIDE;
 
@@ -1631,6 +1633,7 @@ class GLES2DecoderImpl : public GLES2Decoder {
   base::Callback<void(gfx::Size)> resize_callback_;
 
   MsgCallback msg_callback_;
+  WaitSyncPointCallback wait_sync_point_callback_;
 
   StreamTextureManager* stream_texture_manager_;
   scoped_ptr<gfx::AsyncPixelTransferDelegate> async_pixel_transfer_delegate_;
@@ -2978,6 +2981,11 @@ void GLES2DecoderImpl::SetMsgCallback(const MsgCallback& callback) {
   msg_callback_ = callback;
 }
 
+void GLES2DecoderImpl::SetWaitSyncPointCallback(
+    const WaitSyncPointCallback& callback) {
+  wait_sync_point_callback_ = callback;
+}
+
 void GLES2DecoderImpl::SetStreamTextureManager(StreamTextureManager* manager) {
   stream_texture_manager_ = manager;
 }
@@ -9008,6 +9016,15 @@ error::Error GLES2DecoderImpl::HandleLoseContextCHROMIUM(
   return error::kLostContext;
 }
 
+error::Error GLES2DecoderImpl::HandleWaitSyncPointCHROMIUM(
+    uint32 immediate_data_size, const gles2::WaitSyncPointCHROMIUM& c) {
+  if (wait_sync_point_callback_.is_null())
+    return error::kNoError;
+
+  return wait_sync_point_callback_.Run(c.sync_point) ?
+      error::kNoError : error::kDeferCommandUntilLater;
+}
+
 bool GLES2DecoderImpl::GenQueriesEXTHelper(
     GLsizei n, const GLuint* client_ids) {
   for (GLsizei ii = 0; ii < n; ++ii) {