[#8] Pass gfx::Point by const ref.

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 <list>
 #include <set>
 #include <string>
@@ skipping 95 matching lines @@
       LayerTreeHostImplClient* client,
       Proxy* proxy,
       RenderingStatsInstrumentation* rendering_stats_instrumentation,
       SharedBitmapManager* manager,
       int id);
   virtual ~LayerTreeHostImpl();
 
   // InputHandler implementation
   virtual void BindToClient(InputHandlerClient* client) OVERRIDE;
   virtual InputHandler::ScrollStatus ScrollBegin(
-      gfx::Point viewport_point,
+      const gfx::Point& viewport_point,
       InputHandler::ScrollInputType type) OVERRIDE;
-  virtual bool ScrollBy(gfx::Point viewport_point,
+  virtual bool ScrollBy(const gfx::Point& viewport_point,
                         const gfx::Vector2dF& scroll_delta) OVERRIDE;
-  virtual bool ScrollVerticallyByPage(gfx::Point viewport_point,
+  virtual bool ScrollVerticallyByPage(const gfx::Point& viewport_point,
                                       ScrollDirection direction) OVERRIDE;
   virtual void SetRootLayerScrollOffsetDelegate(
       LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate) OVERRIDE;
   virtual void OnRootLayerDelegatedScrollOffsetChanged() OVERRIDE;
   virtual void ScrollEnd() OVERRIDE;
   virtual InputHandler::ScrollStatus FlingScrollBegin() OVERRIDE;
   virtual void NotifyCurrentFlingVelocity(
       const gfx::Vector2dF& velocity) OVERRIDE;
-  virtual void MouseMoveAt(gfx::Point viewport_point) OVERRIDE;
+  virtual void MouseMoveAt(const gfx::Point& viewport_point) OVERRIDE;
   virtual void PinchGestureBegin() OVERRIDE;
   virtual void PinchGestureUpdate(float magnify_delta,
-                                  gfx::Point anchor) OVERRIDE;
+                                  const gfx::Point& anchor) OVERRIDE;
   virtual void PinchGestureEnd() OVERRIDE;
   virtual void StartPageScaleAnimation(const gfx::Vector2d& target_offset,
                                        bool anchor_point,
                                        float page_scale,
                                        base::TimeDelta duration) OVERRIDE;
   virtual void ScheduleAnimation() OVERRIDE;
-  virtual bool HaveTouchEventHandlersAt(gfx::Point viewport_port) OVERRIDE;
+  virtual bool HaveTouchEventHandlersAt(const gfx::Point& viewport_port)
+      OVERRIDE;
   virtual scoped_ptr<SwapPromiseMonitor> CreateLatencyInfoSwapPromiseMonitor(
       ui::LatencyInfo* latency) OVERRIDE;
 
   // TopControlsManagerClient implementation.
   virtual void DidChangeTopControlsPosition() OVERRIDE;
   virtual bool HaveRootScrollLayer() const OVERRIDE;
 
   void StartScrollbarAnimation();
 
   struct CC_EXPORT FrameData : public RenderPassSink {
@@ skipping 514 matching lines @@
   int id_;
 
   std::set<SwapPromiseMonitor*> swap_promise_monitor_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_