[#4] Pass gfx structs by const ref (gfx::PointF)

cc/quads/texture_draw_quad.h

 // Copyright 2012 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_QUADS_TEXTURE_DRAW_QUAD_H_
 #define CC_QUADS_TEXTURE_DRAW_QUAD_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
 #include "cc/quads/draw_quad.h"
 #include "ui/gfx/rect_f.h"
 
 namespace cc {
 
 class CC_EXPORT TextureDrawQuad : public DrawQuad {
  public:
   static scoped_ptr<TextureDrawQuad> Create();
 
   void SetNew(const SharedQuadState* shared_quad_state,
               const gfx::Rect& rect,
               const gfx::Rect& opaque_rect,
               unsigned resource_id,
               bool premultiplied_alpha,
-              gfx::PointF uv_top_left,
-              gfx::PointF uv_bottom_right,
+              const gfx::PointF& uv_top_left,
+              const gfx::PointF& uv_bottom_right,
               SkColor background_color,
               const float vertex_opacity[4],
               bool flipped);
 
   void SetAll(const SharedQuadState* shared_quad_state,
               const gfx::Rect& rect,
               const gfx::Rect& opaque_rect,
               const gfx::Rect& visible_rect,
               bool needs_blending,
               unsigned resource_id,
               bool premultiplied_alpha,
-              gfx::PointF uv_top_left,
-              gfx::PointF uv_bottom_right,
+              const gfx::PointF& uv_top_left,
+              const gfx::PointF& uv_bottom_right,
               SkColor background_color,
               const float vertex_opacity[4],
               bool flipped);
 
   unsigned resource_id;
   bool premultiplied_alpha;
   gfx::PointF uv_top_left;
   gfx::PointF uv_bottom_right;
   SkColor background_color;
   float vertex_opacity[4];
   bool flipped;
 
   virtual void IterateResources(const ResourceIteratorCallback& callback)
       OVERRIDE;
 
   static const TextureDrawQuad* MaterialCast(const DrawQuad*);
 
  private:
   TextureDrawQuad();
   virtual void ExtendValue(base::DictionaryValue* value) const OVERRIDE;
 };
 
 }  // namespace cc
 
 #endif  // CC_QUADS_TEXTURE_DRAW_QUAD_H_