Convert scroll offsets to use SyncedProperty.

cc/layers/picture_layer.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/layers/picture_layer.h"
 
 #include "base/auto_reset.h"
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/picture_layer_impl.h"
 #include "cc/resources/display_list_recording_source.h"
@@ skipping 20 matching lines @@
 PictureLayer::PictureLayer(ContentLayerClient* client,
                            scoped_ptr<RecordingSource> source)
     : PictureLayer(client) {
   recording_source_ = source.Pass();
 }
 
 PictureLayer::~PictureLayer() {
 }
 
 scoped_ptr<LayerImpl> PictureLayer::CreateLayerImpl(LayerTreeImpl* tree_impl) {
-  return PictureLayerImpl::Create(tree_impl, id(), is_mask_);
+  return PictureLayerImpl::Create(tree_impl, id(), is_mask_,
+                                  new LayerImpl::SyncedScrollOffset);
 }
 
 void PictureLayer::PushPropertiesTo(LayerImpl* base_layer) {
   Layer::PushPropertiesTo(base_layer);
   PictureLayerImpl* layer_impl = static_cast<PictureLayerImpl*>(base_layer);
   // TODO(danakj): Make is_mask_ a constructor parameter for PictureLayer.
   DCHECK_EQ(layer_impl->is_mask(), is_mask_);
 
   int source_frame_number = layer_tree_host()->source_frame_number();
   gfx::Size impl_bounds = layer_impl->bounds();
@@ skipping 166 matching lines @@
 
 bool PictureLayer::HasDrawableContent() const {
   return client_ && Layer::HasDrawableContent();
 }
 
 void PictureLayer::RunMicroBenchmark(MicroBenchmark* benchmark) {
   benchmark->RunOnLayer(this);
 }
 
 }  // namespace cc