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

cc/quads/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/draw_quad.h"
 
 #include "base/logging.h"
 #include "base/values.h"
 #include "cc/base/math_util.h"
 #include "cc/debug/traced_value.h"
@@ skipping 18 matching lines @@
 namespace cc {
 
 DrawQuad::DrawQuad()
     : material(INVALID),
       needs_blending(false),
       shared_quad_state() {
 }
 
 void DrawQuad::SetAll(const SharedQuadState* shared_quad_state,
                       Material material,
-                      gfx::Rect rect,
-                      gfx::Rect opaque_rect,
-                      gfx::Rect visible_rect,
+                      const gfx::Rect& rect,
+                      const gfx::Rect& opaque_rect,
+                      const gfx::Rect& visible_rect,
                       bool needs_blending) {
   DCHECK(rect.Contains(visible_rect)) << "rect: " << rect.ToString()
                                       << " visible_rect: "
                                       << visible_rect.ToString();
   DCHECK(opaque_rect.IsEmpty() || rect.Contains(opaque_rect))
       << "rect: " << rect.ToString() << "opaque_rect "
       << opaque_rect.ToString();
 
   this->material = material;
   this->rect = rect;
@@ skipping 87 matching lines @@
              MathUtil::AsValue(visible_rect_as_target_space_quad).release());
   value->SetBoolean("visible_rect_is_clipped", visible_rect_is_clipped);
 
   value->SetBoolean("needs_blending", needs_blending);
   value->SetBoolean("should_draw_with_blending", ShouldDrawWithBlending());
   ExtendValue(value.get());
   return value.PassAs<base::Value>();
 }
 
 }  // namespace cc