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

cc/layers/io_surface_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/io_surface_layer_impl.h"
 
 #include "base/strings/stringprintf.h"
 #include "cc/output/gl_renderer.h"  // For the GLC() macro.
 #include "cc/output/output_surface.h"
 #include "cc/quads/io_surface_draw_quad.h"
@@ skipping 20 matching lines @@
   if (io_surface_resource_id_) {
     ResourceProvider* resource_provider =
         layer_tree_impl()->resource_provider();
     resource_provider->DeleteResource(io_surface_resource_id_);
     io_surface_resource_id_ = 0;
   }
 }
 
 scoped_ptr<LayerImpl> IOSurfaceLayerImpl::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
-  return IOSurfaceLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
+  return IOSurfaceLayerImpl::Create(tree_impl, id());
 }
 
 void IOSurfaceLayerImpl::PushPropertiesTo(LayerImpl* layer) {
   LayerImpl::PushPropertiesTo(layer);
 
   IOSurfaceLayerImpl* io_surface_layer =
       static_cast<IOSurfaceLayerImpl*>(layer);
   io_surface_layer->SetIOSurfaceProperties(io_surface_id_, io_surface_size_);
 }
 
@@ skipping 57 matching lines @@
 
   io_surface_id_ = io_surface_id;
   io_surface_size_ = size;
 }
 
 const char* IOSurfaceLayerImpl::LayerTypeAsString() const {
   return "cc::IOSurfaceLayerImpl";
 }
 
 }  // namespace cc