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

cc/quads/shared_quad_state.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/shared_quad_state.h"
 
 #include "base/values.h"
 #include "cc/base/math_util.h"
 #include "cc/debug/traced_value.h"
 
@@ skipping 11 matching lines @@
 scoped_ptr<SharedQuadState> SharedQuadState::Create() {
   return make_scoped_ptr(new SharedQuadState);
 }
 
 scoped_ptr<SharedQuadState> SharedQuadState::Copy() const {
   return make_scoped_ptr(new SharedQuadState(*this));
 }
 
 void SharedQuadState::SetAll(const gfx::Transform& content_to_target_transform,
                              gfx::Size content_bounds,
-                             gfx::Rect visible_content_rect,
-                             gfx::Rect clip_rect,
+                             const gfx::Rect& visible_content_rect,
+                             const gfx::Rect& clip_rect,
                              bool is_clipped,
                              float opacity,
                              SkXfermode::Mode blend_mode) {
   this->content_to_target_transform = content_to_target_transform;
   this->content_bounds = content_bounds;
   this->visible_content_rect = visible_content_rect;
   this->clip_rect = clip_rect;
   this->is_clipped = is_clipped;
   this->opacity = opacity;
   this->blend_mode = blend_mode;
@@ skipping 11 matching lines @@
   value->Set("clip_rect", MathUtil::AsValue(clip_rect).release());
   value->SetDouble("opacity", opacity);
   value->SetString("blend_mode", SkXfermode::ModeName(blend_mode));
   TracedValue::MakeDictIntoImplicitSnapshotWithCategory(
       TRACE_DISABLED_BY_DEFAULT("cc.debug.quads"),
       value.get(), "cc::SharedQuadState", this);
   return value.PassAs<base::Value>();
 }
 
 }  // namespace cc