Use LatencyInfoSwapPromise to track LatencyInfo through compositor

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/switches.h"
 #include "cc/debug/layer_tree_debug_state.h"
 #include "cc/debug/micro_benchmark.h"
 #include "cc/layers/layer.h"
 #include "cc/trees/layer_tree_host.h"
 #include "content/common/gpu/client/context_provider_command_buffer.h"
 #include "content/public/common/content_switches.h"
 #include "content/renderer/gpu/input_handler_manager.h"
 #include "content/renderer/render_thread_impl.h"
 #include "third_party/WebKit/public/platform/WebSize.h"
@@ skipping 354 matching lines @@
   layer_tree_host_->SetNeedsRedrawRect(damage_rect);
 }
 
 void RenderWidgetCompositor::SetNeedsForcedRedraw() {
   layer_tree_host_->SetNextCommitForcesRedraw();
   setNeedsAnimate();
 }
 
 void RenderWidgetCompositor::SetLatencyInfo(
     const ui::LatencyInfo& latency_info) {
-  layer_tree_host_->SetLatencyInfo(latency_info);
+  scoped_ptr<cc::SwapPromise> swap_promise(
+      new cc::LatencyInfoSwapPromise(latency_info));
+  layer_tree_host_->QueueSwapPromise(swap_promise.Pass());
 }
 
 int RenderWidgetCompositor::GetLayerTreeId() const {
   return layer_tree_host_->id();
 }
 
 void RenderWidgetCompositor::NotifyInputThrottledUntilCommit() {
   layer_tree_host_->NotifyInputThrottledUntilCommit();
 }
 
@@ skipping 255 matching lines @@
   widget_->OnSwapBuffersAborted();
 }
 
 void RenderWidgetCompositor::RateLimitSharedMainThreadContext() {
   cc::ContextProvider* provider =
       RenderThreadImpl::current()->SharedMainThreadContextProvider().get();
   provider->Context3d()->rateLimitOffscreenContextCHROMIUM();
 }
 
 }  // namespace content