[cc] Store CCLayerImpls as scoped_ptrs

cc/CCTiledLayerImpl.h

 // Copyright 2011 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 CCTiledLayerImpl_h
 #define CCTiledLayerImpl_h
 
 #include "CCLayerImpl.h"
 #include <public/WebTransformationMatrix.h>
 
 namespace cc {
 
 class CCLayerTilingData;
 class DrawableTile;
 
 class CCTiledLayerImpl : public CCLayerImpl {
 public:
-    static PassOwnPtr<CCTiledLayerImpl> create(int id)
+    static scoped_ptr<CCTiledLayerImpl> create(int id)
     {
-        return adoptPtr(new CCTiledLayerImpl(id));
+        return make_scoped_ptr(new CCTiledLayerImpl(id));
     }
     virtual ~CCTiledLayerImpl();
 
     virtual void appendQuads(CCQuadSink&, CCAppendQuadsData&) OVERRIDE;
 
     virtual CCResourceProvider::ResourceId contentsResourceId() const OVERRIDE;
 
     virtual void dumpLayerProperties(std::string*, int indent) const OVERRIDE;
 
     void setSkipsDraw(bool skipsDraw) { m_skipsDraw = skipsDraw; }
@@ skipping 22 matching lines @@
 
     bool m_skipsDraw;
     bool m_contentsSwizzled;
 
     OwnPtr<CCLayerTilingData> m_tiler;
 };
 
 }
 
 #endif // CCTiledLayerImpl_h