Keep vsync enabled while there is a pending requestAnimationFrame

cc/scheduler/scheduler_state_machine.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_SCHEDULER_SCHEDULER_STATE_MACHINE_H_
 #define CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 84 matching lines @@
   void DidSwapUseIncompleteTile();
 
   // Indicates whether ACTION_DRAW_IF_POSSIBLE drew to the screen or not.
   void DidDrawIfPossibleCompleted(bool success);
 
   // Indicates that a new commit flow needs to be performed, either to pull
   // updates from the main thread to the impl, or to push deltas from the impl
   // thread to main.
   void SetNeedsCommit();
 
+  void SetAnimateRequested();
+
   // As SetNeedsCommit(), but ensures the BeginFrame will definitely happen even
   // if we are not visible.  After this call we expect to go through the forced
   // commit flow and then return to waiting for a non-forced BeginFrame to
   // finish.
   void SetNeedsForcedCommit();
 
   // Call this only in response to receiving an ACTION_BEGIN_FRAME
   // from NextAction. Indicates that all painting is complete.
   void BeginFrameComplete();
 
@@ skipping 63 matching lines @@
   bool needs_commit_;
   bool needs_forced_commit_;
   bool expect_immediate_begin_frame_;
   bool main_thread_needs_layer_textures_;
   bool inside_vsync_;
   bool visible_;
   bool can_begin_frame_;
   bool can_draw_;
   bool has_pending_tree_;
   bool draw_if_possible_failed_;
+  bool animate_requested_;
   TextureState texture_state_;
   OutputSurfaceState output_surface_state_;
 
   DISALLOW_COPY_AND_ASSIGN(SchedulerStateMachine);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_