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

cc/layers/picture_image_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/layers/picture_image_layer_impl.h"
 
 #include <algorithm>
 
 #include "cc/debug/debug_colors.h"
 #include "cc/trees/layer_tree_impl.h"
 
 namespace cc {
 
 PictureImageLayerImpl::PictureImageLayerImpl(LayerTreeImpl* tree_impl, int id)
     : PictureLayerImpl(tree_impl, id) {
 }
 
 PictureImageLayerImpl::~PictureImageLayerImpl() {
 }
 
 const char* PictureImageLayerImpl::LayerTypeAsString() const {
   return "cc::PictureImageLayerImpl";
 }
 
 scoped_ptr<LayerImpl> PictureImageLayerImpl::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
-  return PictureImageLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
+  return PictureImageLayerImpl::Create(tree_impl, id());
 }
 
 void PictureImageLayerImpl::GetDebugBorderProperties(
     SkColor* color, float* width) const {
   *color = DebugColors::ImageLayerBorderColor();
   *width = DebugColors::ImageLayerBorderWidth(layer_tree_impl());
 }
 
 bool PictureImageLayerImpl::ShouldAdjustRasterScale() const {
   return false;
@@ skipping 11 matching lines @@
 }
 
 void PictureImageLayerImpl::UpdateIdealScales() {
   ideal_contents_scale_ = 1.f;
   ideal_page_scale_ = 1.f;
   ideal_device_scale_ = 1.f;
   ideal_source_scale_ = 1.f;
 }
 
 }  // namespace cc