cc: Add ScopedReadLockGpuMemoryBuffer

cc/surfaces/surface.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/surfaces/surface.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 30 matching lines @@
   if (!draw_callback_.is_null())
     draw_callback_.Run(SurfaceDrawStatus::DRAW_SKIPPED);
 }
 
 void Surface::SetPreviousFrameSurface(Surface* surface) {
   DCHECK(surface);
   frame_index_ = surface->frame_index() + 1;
   previous_frame_surface_id_ = surface->surface_id();
 }
 
+void Surface::SetGpuMemoryBufferClientId(int gpu_memory_buffer_client_id) {
+  // This should only be set once.
+  DCHECK_EQ(-1, gpu_memory_buffer_client_id_);
+  DCHECK_NE(gpu_memory_buffer_client_id, gpu_memory_buffer_client_id_);
+  gpu_memory_buffer_client_id_ = gpu_memory_buffer_client_id;
+}
+
 void Surface::QueueFrame(std::unique_ptr<CompositorFrame> frame,
                          const DrawCallback& callback) {
   DCHECK(factory_);
   ClearCopyRequests();
 
   if (frame) {
     TakeLatencyInfo(&frame->metadata.latency_info);
   }
 
   std::unique_ptr<CompositorFrame> previous_frame = std::move(current_frame_);
@@ skipping 129 matching lines @@
   if (current_frame_) {
     for (const auto& render_pass :
          current_frame_->delegated_frame_data->render_pass_list) {
       for (const auto& copy_request : render_pass->copy_requests)
         copy_request->SendEmptyResult();
     }
   }
 }
 
 }  // namespace cc