Deliver IPC messages together with SwapCompositorFrame

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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 "content/renderer/gpu/render_widget_compositor.h"
 
 #include <limits>
 #include <string>
 
 #if defined(OS_ANDROID)
 #include "base/android/sys_utils.h"
 #endif
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/synchronization/lock.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "cc/base/latency_info_swap_promise.h"
 #include "cc/base/latency_info_swap_promise_monitor.h"
+#include "cc/base/swap_promise.h"
 #include "cc/base/switches.h"
 #include "cc/debug/layer_tree_debug_state.h"
 #include "cc/debug/micro_benchmark.h"
 #include "cc/layers/layer.h"
 #include "cc/output/copy_output_request.h"
 #include "cc/output/copy_output_result.h"
 #include "cc/resources/single_release_callback.h"
 #include "cc/trees/layer_tree_host.h"
 #include "content/child/child_shared_bitmap_manager.h"
 #include "content/common/content_switches_internal.h"
@@ skipping 366 matching lines @@
 
 void RenderWidgetCompositor::QueueSwapPromise(
     scoped_ptr<cc::SwapPromise> swap_promise) {
   layer_tree_host_->QueueSwapPromise(swap_promise.Pass());
 }
 
 int RenderWidgetCompositor::GetLayerTreeId() const {
   return layer_tree_host_->id();
 }
 
+int RenderWidgetCompositor::GetSourceFrameNumber() const {
+  return layer_tree_host_->source_frame_number();
+}
+
 void RenderWidgetCompositor::NotifyInputThrottledUntilCommit() {
   layer_tree_host_->NotifyInputThrottledUntilCommit();
 }
 
 const cc::Layer* RenderWidgetCompositor::GetRootLayer() const {
   return layer_tree_host_->root_layer();
 }
 
 int RenderWidgetCompositor::ScheduleMicroBenchmark(
     const std::string& name,
@@ skipping 290 matching lines @@
   cc::ContextProvider* provider =
       RenderThreadImpl::current()->SharedMainThreadContextProvider().get();
   provider->ContextGL()->RateLimitOffscreenContextCHROMIUM();
 }
 
 bool RenderWidgetCompositor::usesGpuRasterization() {
   return layer_tree_host_->UseGpuRasterization();
 }
 
 }  // namespace content