[VSync Queue] Flush input in CommitComplete()

cc/trees/layer_tree_host_impl.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_LAYER_TREE_HOST_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <stddef.h>
 
 #include <bitset>
@@ skipping 136 matching lines @@
       RenderingStatsInstrumentation* rendering_stats_instrumentation,
       TaskGraphRunner* task_graph_runner,
       std::unique_ptr<MutatorHost> mutator_host,
       int id,
       scoped_refptr<base::SequencedTaskRunner> image_worker_task_runner);
   ~LayerTreeHostImpl() override;
 
   // InputHandler implementation
   void BindToClient(InputHandlerClient* client,
                     bool wheel_scroll_latching_enabled) override;
+  InputHandlerState GetInputHandlerState() const override;
   InputHandler::ScrollStatus ScrollBegin(
       ScrollState* scroll_state,
       InputHandler::ScrollInputType type) override;
   InputHandler::ScrollStatus RootScrollBegin(
       ScrollState* scroll_state,
       InputHandler::ScrollInputType type) override;
   ScrollStatus ScrollAnimatedBegin(const gfx::Point& viewport_point) override;
   InputHandler::ScrollStatus ScrollAnimated(
       const gfx::Point& viewport_point,
       const gfx::Vector2dF& scroll_delta,
@@ skipping 696 matching lines @@
   // begin main frame. These callbacks must only be called on the main thread.
   std::vector<base::Closure> completed_image_decode_callbacks_;
 
   // These are used to transfer usage of touch and wheel scrolls to the main
   // thread.
   bool has_scrolled_by_wheel_;
   bool has_scrolled_by_touch_;
 
   bool touchpad_and_wheel_scroll_latching_enabled_;
 
+  InputHandlerState input_handler_state_;
+
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_