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

cc/layers/surface_layer_impl.cc

 // Copyright 2014 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/surface_layer_impl.h"
 
 #include "base/debug/trace_event_argument.h"
 #include "cc/debug/debug_colors.h"
 #include "cc/quads/surface_draw_quad.h"
 #include "cc/trees/occlusion_tracker.h"
 
 namespace cc {
 
 SurfaceLayerImpl::SurfaceLayerImpl(LayerTreeImpl* tree_impl, int id)
     : LayerImpl(tree_impl, id) {
 }
 
 SurfaceLayerImpl::~SurfaceLayerImpl() {}
 
 scoped_ptr<LayerImpl> SurfaceLayerImpl::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
-  return SurfaceLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
+  return SurfaceLayerImpl::Create(tree_impl, id());
 }
 
 void SurfaceLayerImpl::SetSurfaceId(SurfaceId surface_id) {
   if (surface_id_ == surface_id)
     return;
 
   surface_id_ = surface_id;
   NoteLayerPropertyChanged();
 }
 
@@ skipping 39 matching lines @@
 void SurfaceLayerImpl::AsValueInto(base::debug::TracedValue* dict) const {
   LayerImpl::AsValueInto(dict);
   dict->SetInteger("surface_id", surface_id_.id);
 }
 
 const char* SurfaceLayerImpl::LayerTypeAsString() const {
   return "cc::SurfaceLayerImpl";
 }
 
 }  // namespace cc