Pass gfx structs by const ref(gfx::Vector2D/F)

content/browser/renderer_host/input/input_router_impl_perftest.cc

 // Copyright 2014 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 "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/renderer_host/input/input_ack_handler.h"
 #include "content/browser/renderer_host/input/input_router_client.h"
 #include "content/browser/renderer_host/input/input_router_impl.h"
 #include "content/common/input/web_input_event_traits.h"
@@ skipping 90 matching lines @@
 
   bool HasMessages() const { return sent_count_ > 0; }
 
  private:
   size_t sent_count_;
 };
 
 // TODO(jdduke): Use synthetic gesture pipeline, crbug.com/344598.
 typedef std::vector<WebGestureEvent> Gestures;
 Gestures BuildScrollSequence(size_t steps,
-                             gfx::Vector2dF origin,
-                             gfx::Vector2dF distance) {
+                             const gfx::Vector2dF& origin,
+                             const gfx::Vector2dF& distance) {
   Gestures gestures;
   const gfx::Vector2dF delta = ScaleVector2d(distance, 1.f / steps);
 
   WebGestureEvent gesture;
   gesture.type = WebInputEvent::GestureScrollBegin;
   gesture.x = origin.x();
   gesture.y = origin.y();
   gestures.push_back(gesture);
 
   gesture.type = WebInputEvent::GestureScrollUpdate;
   gesture.data.scrollUpdate.deltaX = delta.x();
   gesture.data.scrollUpdate.deltaY = delta.y();
   for (size_t i = 0; i < steps; ++i) {
     gesture.x += delta.x();
     gesture.y += delta.y();
     gestures.push_back(gesture);
   }
 
   gesture.type = WebInputEvent::GestureScrollEnd;
   gestures.push_back(gesture);
   return gestures;
 }
 
 typedef std::vector<WebTouchEvent> Touches;
 Touches BuildTouchSequence(size_t steps,
-                           gfx::Vector2dF origin,
-                           gfx::Vector2dF distance) {
+                           const gfx::Vector2dF& origin,
+                           const gfx::Vector2dF& distance) {
   Touches touches;
   const gfx::Vector2dF delta = ScaleVector2d(distance, 1.f / steps);
 
   WebTouchEvent touch;
   touch.touchesLength = 1;
   touch.type = WebInputEvent::TouchStart;
   touch.touches[0].id = 0;
   touch.touches[0].state = WebTouchPoint::StatePressed;
   touch.touches[0].position.x = origin.x();
   touch.touches[0].position.y = origin.y();
@@ skipping 141 matching lines @@
       if (ack_delay)
         SendEventAckIfNecessary(events.back(), INPUT_EVENT_ACK_STATE_CONSUMED);
 
       EXPECT_EQ(event_count, GetAndResetSentEventCount());
       EXPECT_EQ(event_count, GetAndResetAckCount());
     }
   }
 
   void SimulateTouchAndScrollEventSequence(const char* test_name,
                                            size_t steps,
-                                           gfx::Vector2dF origin,
-                                           gfx::Vector2dF distance,
+                                           const gfx::Vector2dF& origin,
+                                           const gfx::Vector2dF& distance,
                                            size_t iterations) {
     OnHasTouchEventHandlers(true);
 
     Gestures gestures = BuildScrollSequence(steps, origin, distance);
     Touches touches = BuildTouchSequence(steps, origin, distance);
     ASSERT_EQ(touches.size(), gestures.size());
 
     const size_t event_count = gestures.size();
     const size_t total_event_count = event_count * iterations * 2;
 
@@ skipping 63 matching lines @@
 
 TEST_F(InputRouterImplPerfTest, TouchSwipeToGestureScroll) {
   SimulateTouchAndScrollEventSequence("TouchSwipeToGestureScroll ",
                                       kDefaultSteps,
                                       kDefaultOrigin,
                                       kDefaultDistance,
                                       kDefaultIterations);
 }
 
 }  // namespace content