[cc] Store CCLayerImpls as scoped_ptrs

cc/CCDelegatedRendererLayerImpl.h

 // 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.
 
 #ifndef CCDelegatedRendererLayerImpl_h
 #define CCDelegatedRendererLayerImpl_h
 
 #include "CCLayerImpl.h"
 #include "cc/scoped_ptr_vector.h"
 
 namespace cc {
 
 class CCDelegatedRendererLayerImpl : public CCLayerImpl {
 public:
-    static PassOwnPtr<CCDelegatedRendererLayerImpl> create(int id) { return adoptPtr(new CCDelegatedRendererLayerImpl(id)); }
+    static scoped_ptr<CCDelegatedRendererLayerImpl> create(int id) { return make_scoped_ptr(new CCDelegatedRendererLayerImpl(id)); }
     virtual ~CCDelegatedRendererLayerImpl();
 
     virtual bool descendantDrawsContent() OVERRIDE;
     virtual bool hasContributingDelegatedRenderPasses() const OVERRIDE;
 
     // This gives ownership of the RenderPasses to the layer.
     void setRenderPasses(ScopedPtrVector<CCRenderPass>&);
     void clearRenderPasses();
 
     virtual void didLoseContext() OVERRIDE;
@@ skipping 15 matching lines @@
 
     virtual const char* layerTypeAsString() const OVERRIDE;
 
     ScopedPtrVector<CCRenderPass> m_renderPassesInDrawOrder;
     base::hash_map<CCRenderPass::Id, int> m_renderPassesIndexById;
 };
 
 }
 
 #endif // CCDelegatedRendererLayerImpl_h