cc: Get BeginFrameArgs for STP::BeginMainFrame while inside an impl frame.

cc/trees/single_thread_proxy.h

 // Copyright 2011 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.
 
 #ifndef CC_TREES_SINGLE_THREAD_PROXY_H_
 #define CC_TREES_SINGLE_THREAD_PROXY_H_
 
 #include <limits>
 
 #include "base/cancelable_callback.h"
@@ skipping 111 matching lines @@
   void CompositeImmediately(base::TimeTicks frame_begin_time);
 
  protected:
   SingleThreadProxy(
       LayerTreeHost* layer_tree_host,
       LayerTreeHostSingleThreadClient* client,
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
       scoped_ptr<BeginFrameSource> external_begin_frame_source);
 
  private:
-  void BeginMainFrame();
+  void BeginMainFrame(const BeginFrameArgs& begin_frame_args);
   void BeginMainFrameAbortedOnImplThread(CommitEarlyOutReason reason);
   void DoAnimate();
   void DoBeginMainFrame(const BeginFrameArgs& begin_frame_args);
   void DoCommit();
   DrawResult DoComposite(base::TimeTicks frame_begin_time,
                          LayerTreeHostImpl::FrameData* frame);
   void DoSwap();
   void DidCommitAndDrawFrame();
   void CommitComplete();
 
@@ skipping 10 matching lines @@
   RendererCapabilities renderer_capabilities_for_main_thread_;
 
   // Accessed from both threads.
   scoped_ptr<Scheduler> scheduler_on_impl_thread_;
   ProxyTimingHistory timing_history_;
 
   scoped_ptr<BlockingTaskRunner::CapturePostTasks> commit_blocking_task_runner_;
   scoped_ptr<ResourceUpdateQueue> queue_for_commit_;
   bool next_frame_is_newly_committed_frame_;
 
+  bool inside_impl_frame_;
   bool inside_draw_;
   bool defer_commits_;
   bool animate_requested_;
   bool commit_requested_;
   bool inside_synchronous_composite_;
 
   // True if a request to the LayerTreeHostClient to create an output surface
   // is still outstanding.
   bool output_surface_creation_requested_;
 
@@ skipping 62 matching lines @@
  private:
   DebugScopedSetImplThread impl_thread_;
   DebugScopedSetMainThreadBlocked main_thread_blocked_;
 
   DISALLOW_COPY_AND_ASSIGN(DebugScopedSetImplThreadAndMainThreadBlocked);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_SINGLE_THREAD_PROXY_H_