Pass gfx structs by const ref (gfx::Vector2d/F)

ui/events/ozone/evdev/device_event_dispatcher_evdev.cc

 // Copyright 2015 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 "ui/events/ozone/evdev/device_event_dispatcher_evdev.h"
 
 namespace ui {
 
 KeyEventParams::KeyEventParams(int device_id,
                                unsigned int code,
@@ skipping 51 matching lines @@
 
 MouseWheelEventParams::MouseWheelEventParams(
     const MouseWheelEventParams& other) = default;
 
 MouseWheelEventParams::~MouseWheelEventParams() {
 }
 
 ScrollEventParams::ScrollEventParams(int device_id,
                                      EventType type,
                                      const gfx::PointF location,
-                                     const gfx::Vector2dF delta,
-                                     const gfx::Vector2dF ordinal_delta,
+                                     const gfx::Vector2dF& delta,
+                                     const gfx::Vector2dF& ordinal_delta,
                                      int finger_count,
                                      const base::TimeDelta timestamp)
     : device_id(device_id),
       type(type),
       location(location),
       delta(delta),
       ordinal_delta(ordinal_delta),
       finger_count(finger_count),
       timestamp(timestamp) {
 }
@@ skipping 18 matching lines @@
       pressure(pressure),
       timestamp(timestamp) {
 }
 
 TouchEventParams::TouchEventParams(const TouchEventParams& other) = default;
 
 TouchEventParams::~TouchEventParams() {
 }
 
 }  // namspace ui