cc: Release main thread earlier

cc/trees/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_THREAD_PROXY_H_
 #define CC_TREES_THREAD_PROXY_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 211 matching lines @@
   RendererCapabilities renderer_capabilities_main_thread_copy_;
   bool started_;
   bool textures_acquired_;
   bool in_composite_and_readback_;
   bool manage_tiles_pending_;
   // Weak pointer to use when posting tasks to the impl thread.
   base::WeakPtr<ThreadProxy> impl_thread_weak_ptr_;
 
   // Accessed on the main thread, or when main thread is blocked.
   bool commit_waits_for_activation_;
-  bool inside_commit_;
+  bool main_thread_inside_commit_;
 
   scoped_ptr<LayerTreeHostImpl> layer_tree_host_impl_;
 
   scoped_ptr<Scheduler> scheduler_on_impl_thread_;
 
   // Set when the main thread is waiting on a
   // ScheduledActionSendBeginMainFrame to be issued.
   CompletionEvent*
       begin_main_frame_sent_completion_event_on_impl_thread_;
 
@@ skipping 46 matching lines @@
   base::WeakPtrFactory<ThreadProxy> weak_factory_;
 
   const int layer_tree_host_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ThreadProxy);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_THREAD_PROXY_H_