Revert of cc: Remove use of PassAs() and constructor-casting with scoped_ptr.

cc/layers/delegated_renderer_layer_impl.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/delegated_renderer_layer_impl.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 165 matching lines @@
   render_passes_in_draw_order->clear();
 }
 
 void DelegatedRendererLayerImpl::ClearRenderPasses() {
   render_passes_index_by_id_.clear();
   render_passes_in_draw_order_.clear();
 }
 
 scoped_ptr<LayerImpl> DelegatedRendererLayerImpl::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
-  return DelegatedRendererLayerImpl::Create(tree_impl, id());
+  return DelegatedRendererLayerImpl::Create(
+      tree_impl, id()).PassAs<LayerImpl>();
 }
 
 void DelegatedRendererLayerImpl::ReleaseResources() {
   ClearRenderPasses();
   ClearChildId();
 }
 
 static inline int IndexToId(int index) { return index + 1; }
 static inline int IdToIndex(int id) { return id - 1; }
 
@@ skipping 298 matching lines @@
   if (own_child_id_) {
     ResourceProvider* provider = layer_tree_impl()->resource_provider();
     provider->DestroyChild(child_id_);
   }
 
   resources_.clear();
   child_id_ = 0;
 }
 
 }  // namespace cc