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

cc/test/fake_picture_layer_impl.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/test/fake_picture_layer_impl.h"
 
 #include <vector>
 #include "cc/resources/tile.h"
 #include "cc/trees/layer_tree_impl.h"
 
@@ skipping 32 matching lines @@
     : PictureLayerImpl(tree_impl, id),
       append_quads_count_(0),
       did_become_active_call_count_(0),
       has_valid_tile_priorities_(false),
       use_set_valid_tile_priorities_flag_(false),
       release_resources_count_(0) {
 }
 
 scoped_ptr<LayerImpl> FakePictureLayerImpl::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
-  return make_scoped_ptr(new FakePictureLayerImpl(tree_impl, id()));
+  return make_scoped_ptr(
+      new FakePictureLayerImpl(tree_impl, id())).PassAs<LayerImpl>();
 }
 
 void FakePictureLayerImpl::AppendQuads(
     RenderPass* render_pass,
     const OcclusionTracker<LayerImpl>& occlusion_tracker,
     AppendQuadsData* append_quads_data) {
   PictureLayerImpl::AppendQuads(
       render_pass, occlusion_tracker, append_quads_data);
   ++append_quads_count_;
 }
@@ skipping 116 matching lines @@
              ? has_valid_tile_priorities_
              : PictureLayerImpl::HasValidTilePriorities();
 }
 
 void FakePictureLayerImpl::ReleaseResources() {
   PictureLayerImpl::ReleaseResources();
   ++release_resources_count_;
 }
 
 }  // namespace cc