Pass gfx structs by const ref (gfx::PointF)

cc/layers/texture_layer_impl.cc

 // 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.
 
 #include "cc/layers/texture_layer_impl.h"
 
 #include <vector>
 
 #include "base/strings/stringprintf.h"
 #include "cc/output/renderer.h"
@@ skipping 201 matching lines @@
 void TextureLayerImpl::SetFlipped(bool flipped) {
   flipped_ = flipped;
   SetNeedsPushProperties();
 }
 
 void TextureLayerImpl::SetNearestNeighbor(bool nearest_neighbor) {
   nearest_neighbor_ = nearest_neighbor;
   SetNeedsPushProperties();
 }
 
-void TextureLayerImpl::SetUVTopLeft(const gfx::PointF top_left) {
+void TextureLayerImpl::SetUVTopLeft(const gfx::PointF& top_left) {
   uv_top_left_ = top_left;
   SetNeedsPushProperties();
 }
 
-void TextureLayerImpl::SetUVBottomRight(const gfx::PointF bottom_right) {
+void TextureLayerImpl::SetUVBottomRight(const gfx::PointF& bottom_right) {
   uv_bottom_right_ = bottom_right;
   SetNeedsPushProperties();
 }
 
 // 1--2
 // |  |
 // 0--3
 void TextureLayerImpl::SetVertexOpacity(const float vertex_opacity[4]) {
   vertex_opacity_[0] = vertex_opacity[0];
   vertex_opacity_[1] = vertex_opacity[1];
@@ skipping 19 matching lines @@
   } else if (external_texture_resource_) {
     DCHECK(!own_mailbox_);
     ResourceProvider* resource_provider =
         layer_tree_impl()->resource_provider();
     resource_provider->DeleteResource(external_texture_resource_);
     external_texture_resource_ = 0;
   }
 }
 
 }  // namespace cc