[#7] Pass gfx structs by const ref (gfx::Size)

cc/quads/io_surface_draw_quad.cc

 // 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.
 
 #include "cc/quads/io_surface_draw_quad.h"
 
 #include "base/logging.h"
 #include "base/values.h"
 #include "cc/base/math_util.h"
 
 namespace cc {
 
 IOSurfaceDrawQuad::IOSurfaceDrawQuad()
     : io_surface_resource_id(0),
       orientation(FLIPPED) {
 }
 
 scoped_ptr<IOSurfaceDrawQuad> IOSurfaceDrawQuad::Create() {
   return make_scoped_ptr(new IOSurfaceDrawQuad);
 }
 
 void IOSurfaceDrawQuad::SetNew(const SharedQuadState* shared_quad_state,
                                const gfx::Rect& rect,
                                const gfx::Rect& opaque_rect,
-                               gfx::Size io_surface_size,
+                               const gfx::Size& io_surface_size,
                                unsigned io_surface_resource_id,
                                Orientation orientation) {
   gfx::Rect visible_rect = rect;
   bool needs_blending = false;
   DrawQuad::SetAll(shared_quad_state, DrawQuad::IO_SURFACE_CONTENT, rect,
                    opaque_rect, visible_rect, needs_blending);
   this->io_surface_size = io_surface_size;
   this->io_surface_resource_id = io_surface_resource_id;
   this->orientation = orientation;
 }
 
 void IOSurfaceDrawQuad::SetAll(const SharedQuadState* shared_quad_state,
                                const gfx::Rect& rect,
                                const gfx::Rect& opaque_rect,
                                const gfx::Rect& visible_rect,
                                bool needs_blending,
-                               gfx::Size io_surface_size,
+                               const gfx::Size& io_surface_size,
                                unsigned io_surface_resource_id,
                                Orientation orientation) {
   DrawQuad::SetAll(shared_quad_state, DrawQuad::IO_SURFACE_CONTENT, rect,
                    opaque_rect, visible_rect, needs_blending);
   this->io_surface_size = io_surface_size;
   this->io_surface_resource_id = io_surface_resource_id;
   this->orientation = orientation;
 }
 
 void IOSurfaceDrawQuad::IterateResources(
@@ skipping 17 matching lines @@
       break;
     case UNFLIPPED:
       orientation_string = "unflipped";
       break;
   }
 
   value->SetString("orientation", orientation_string);
 }
 
 }  // namespace cc