[#6]Pass gfx structs by const ref (gfx::Vector2d)

content/renderer/input/input_handler_proxy_unittest.cc

 // Copyright 2013 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.
 
 #include "content/renderer/input/input_handler_proxy.h"
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/swap_promise_monitor.h"
 #include "content/renderer/input/input_handler_proxy_client.h"
@@ skipping 44 matching lines @@
   MOCK_METHOD0(ScrollEnd, void());
   MOCK_METHOD0(FlingScrollBegin, cc::InputHandler::ScrollStatus());
 
   virtual scoped_ptr<cc::SwapPromiseMonitor>
     CreateLatencyInfoSwapPromiseMonitor(ui::LatencyInfo* latency) OVERRIDE {
       return scoped_ptr<cc::SwapPromiseMonitor>();
   }
 
   virtual void BindToClient(cc::InputHandlerClient* client) OVERRIDE {}
 
-  virtual void StartPageScaleAnimation(gfx::Vector2d target_offset,
+  virtual void StartPageScaleAnimation(const gfx::Vector2d& target_offset,
                                        bool anchor_point,
                                        float page_scale,
                                        base::TimeDelta duration) OVERRIDE {}
 
   virtual void NotifyCurrentFlingVelocity(
       const gfx::Vector2dF& velocity) OVERRIDE {}
   virtual void MouseMoveAt(gfx::Point mouse_position) OVERRIDE {}
 
   MOCK_METHOD1(HaveTouchEventHandlersAt,
                bool(gfx::Point point));
@@ skipping 1133 matching lines @@
 
   touch.touchesLength = 3;
   touch.touches[0] = CreateWebTouchPoint(WebTouchPoint::StatePressed, 0, 0);
   touch.touches[1] = CreateWebTouchPoint(WebTouchPoint::StatePressed, 10, 10);
   touch.touches[2] = CreateWebTouchPoint(WebTouchPoint::StatePressed, -10, 10);
   EXPECT_EQ(expected_disposition_, input_handler_->HandleInputEvent(touch));
 }
 
 } // namespace
 } // namespace content