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

cc/test/fake_content_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/test/fake_content_layer_impl.h"
 
 namespace cc {
 
 FakeContentLayerImpl::FakeContentLayerImpl(LayerTreeImpl* tree_impl, int id)
     : TiledLayerImpl(tree_impl, id), lost_output_surface_count_(0) {
 }
 
 FakeContentLayerImpl::~FakeContentLayerImpl() {}
 
 scoped_ptr<LayerImpl> FakeContentLayerImpl::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
-  return FakeContentLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
+  return FakeContentLayerImpl::Create(tree_impl, id());
 }
 
 bool FakeContentLayerImpl::HaveResourceForTileAt(int i, int j) {
   return HasResourceIdForTileAt(i, j);
 }
 
 void FakeContentLayerImpl::ReleaseResources() {
   TiledLayerImpl::ReleaseResources();
   ++lost_output_surface_count_;
 }
 
 }  // namespace cc