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

cc/layers/picture_image_layer.cc

 // Copyright 2010 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.h"
 
 #include "cc/layers/picture_image_layer_impl.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 
 namespace cc {
 
 scoped_refptr<PictureImageLayer> PictureImageLayer::Create() {
   return make_scoped_refptr(new PictureImageLayer());
 }
 
 PictureImageLayer::PictureImageLayer() : PictureLayer(this) {}
 
 PictureImageLayer::~PictureImageLayer() {
   ClearClient();
 }
 
 scoped_ptr<LayerImpl> PictureImageLayer::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
-  return PictureImageLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
+  return PictureImageLayerImpl::Create(tree_impl, id());
 }
 
 bool PictureImageLayer::HasDrawableContent() const {
   return !bitmap_.isNull() && PictureLayer::HasDrawableContent();
 }
 
 void PictureImageLayer::SetBitmap(const SkBitmap& bitmap) {
   // SetBitmap() currently gets called whenever there is any
   // style change that affects the layer even if that change doesn't
   // affect the actual contents of the image (e.g. a CSS animation).
@@ skipping 23 matching lines @@
   // to the root canvas, this draw must use the kSrcOver_Mode so that
   // transparent images blend correctly.
   canvas->drawBitmap(bitmap_, 0, 0);
 }
 
 bool PictureImageLayer::FillsBoundsCompletely() const {
   return false;
 }
 
 }  // namespace cc