cc: Convert non-const reference arguments to pointers.

cc/resources/picture_layer_tiling_set.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/resources/picture_layer_tiling_set.h"
 
 namespace cc {
 
 namespace {
 
@@ skipping 205 matching lines @@
       ++tiling_iter_;
     }
     if (tiling_iter_)
       return *this;
 
     // If the set of current rects for this tiling is done, go to the next
     // tiling and set up to iterate through all of the remaining holes.
     // This will also happen the first time through the loop.
     if (!region_iter_.has_rect()) {
       current_tiling_ = NextTiling();
-      current_region_.Swap(missing_region_);
+      current_region_.Swap(&missing_region_);
       missing_region_.Clear();
       region_iter_ = Region::Iterator(current_region_);
 
       // All done and all filled.
       if (!region_iter_.has_rect()) {
         current_tiling_ = set_->tilings_.size();
         return *this;
       }
 
       // No more valid tiles, return this checkerboard rect.
@@ skipping 67 matching lines @@
 }
 
 scoped_ptr<base::Value> PictureLayerTilingSet::AsValue() const {
   scoped_ptr<base::ListValue> state(new base::ListValue());
   for (size_t i = 0; i < tilings_.size(); ++i)
     state->Append(tilings_[i]->AsValue().release());
   return state.PassAs<base::Value>();
 }
 
 }  // namespace cc