cc: Make the PictureLayerImpl raster source null until commit.

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 26 matching lines @@
 }
 
 scoped_ptr<LayerImpl> PictureLayer::CreateLayerImpl(LayerTreeImpl* tree_impl) {
   return PictureLayerImpl::Create(tree_impl, id(), is_mask_);
 }
 
 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_);
+  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();
   gfx::Size recording_source_bounds = recording_source_->GetSize();
 
   // If update called, then recording source size must match bounds pushed to
   // impl layer.
   DCHECK_IMPLIES(update_source_frame_number_ == source_frame_number,
                  impl_bounds == recording_source_bounds)
       << " bounds " << impl_bounds.ToString() << " recording source "
@@ skipping 149 matching lines @@
 
 bool PictureLayer::HasDrawableContent() const {
   return client_ && Layer::HasDrawableContent();
 }
 
 void PictureLayer::RunMicroBenchmark(MicroBenchmark* benchmark) {
   benchmark->RunOnLayer(this);
 }
 
 }  // namespace cc