[#2] Pass gfx structs by const ref (gfx::Rect, gfx::RectF)

cc/quads/render_pass.h

 // 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.
 
 #ifndef CC_QUADS_RENDER_PASS_H_
 #define CC_QUADS_RENDER_PASS_H_
 
 #include <utility>
 
 #include "base/basictypes.h"
@@ skipping 58 matching lines @@
 
   // A shallow copy of the render pass, which does not include its quads or copy
   // requests.
   scoped_ptr<RenderPass> Copy(Id new_id) const;
 
   // A deep copy of the render passes in the list including the quads.
   static void CopyAll(const ScopedPtrVector<RenderPass>& in,
                       ScopedPtrVector<RenderPass>* out);
 
   void SetNew(Id id,
-              gfx::Rect output_rect,
-              gfx::RectF damage_rect,
+              const gfx::Rect& output_rect,
+              const gfx::RectF& damage_rect,
               const gfx::Transform& transform_to_root_target);
 
   void SetAll(Id id,
-              gfx::Rect output_rect,
-              gfx::RectF damage_rect,
+              const gfx::Rect& output_rect,
+              const gfx::RectF& damage_rect,
               const gfx::Transform& transform_to_root_target,
               bool has_transparent_background);
 
   scoped_ptr<base::Value> AsValue() const;
 
   // Uniquely identifies the render pass in the compositor's current frame.
   Id id;
 
   // These are in the space of the render pass' physical pixels.
   gfx::Rect output_rect;
@@ skipping 41 matching lines @@
 #error define a hash function for your compiler
 #endif  // COMPILER
 }  // namespace BASE_HASH_NAMESPACE
 
 namespace cc {
 typedef ScopedPtrVector<RenderPass> RenderPassList;
 typedef base::hash_map<RenderPass::Id, RenderPass*> RenderPassIdHashMap;
 }  // namespace cc
 
 #endif  // CC_QUADS_RENDER_PASS_H_