cc: Add a tiling iterator that doesn't include borders

cc/resources/picture_pile_base.cc

 // Copyright 2013 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_pile_base.h"
 
 #include <algorithm>
 #include <set>
 #include <vector>
 
@@ skipping 193 matching lines @@
   gfx::Rect padded_rect = rect;
   padded_rect.Inset(
       -buffer_pixels(), -buffer_pixels(), -buffer_pixels(), -buffer_pixels());
   return padded_rect;
 }
 
 scoped_ptr<base::Value> PicturePileBase::AsValue() const {
   scoped_ptr<base::ListValue> pictures(new base::ListValue());
   gfx::Rect layer_rect(tiling_.total_size());
   std::set<void*> appended_pictures;
-  for (TilingData::Iterator tile_iter(&tiling_, layer_rect);
-       tile_iter; ++tile_iter) {
+  bool include_borders = true;
+  for (TilingData::Iterator tile_iter(&tiling_, layer_rect, include_borders);
+       tile_iter;
+       ++tile_iter) {
     PictureMap::const_iterator map_iter = picture_map_.find(tile_iter.index());
     if (map_iter == picture_map_.end())
       continue;
 
     Picture* picture = map_iter->second.GetPicture();
     if (picture && (appended_pictures.count(picture) == 0)) {
       appended_pictures.insert(picture);
       pictures->Append(TracedValue::CreateIDRef(picture).release());
     }
   }
@@ skipping 51 matching lines @@
     info.picture_ = picture_->GetCloneForDrawingOnThread(thread_index);
   return info;
 }
 
 float PicturePileBase::PictureInfo::GetInvalidationFrequency() const {
   return invalidation_history_.count() /
          static_cast<float>(INVALIDATION_FRAMES_TRACKED);
 }
 
 }  // namespace cc