[#8] Pass gfx::Point by const ref.

cc/base/region.cc

 // Copyright (c) 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/base/region.h"
 #include "base/values.h"
 
 namespace cc {
 
 Region::Region() {
@@ skipping 29 matching lines @@
 }
 
 bool Region::IsEmpty() const {
   return skregion_.isEmpty();
 }
 
 int Region::GetRegionComplexity() const {
   return skregion_.computeRegionComplexity();
 }
 
-bool Region::Contains(gfx::Point point) const {
+bool Region::Contains(const gfx::Point& point) const {
   return skregion_.contains(point.x(), point.y());
 }
 
 bool Region::Contains(const gfx::Rect& rect) const {
   if (rect.IsEmpty())
     return true;
   return skregion_.contains(gfx::RectToSkIRect(rect));
 }
 
 bool Region::Contains(const Region& region) const {
@@ skipping 63 matching lines @@
 }
 
 Region::Iterator::Iterator(const Region& region)
     : it_(region.skregion_) {
 }
 
 Region::Iterator::~Iterator() {
 }
 
 }  // namespace cc