[cc] Store CCLayerImpls as scoped_ptrs

cc/TextureLayerChromium.h

 // 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.
 
 #ifndef TextureLayerChromium_h
 #define TextureLayerChromium_h
 
 #if USE(ACCELERATED_COMPOSITING)
 
 #include "LayerChromium.h"
 
 namespace WebKit {
 class WebGraphicsContext3D;
 }
 
 namespace cc {
 
 class TextureLayerChromiumClient;
 
 // A Layer containing a the rendered output of a plugin instance.
 class TextureLayerChromium : public LayerChromium {
 public:
     // If this texture layer requires special preparation logic for each frame driven by
     // the compositor, pass in a non-nil client. Pass in a nil client pointer if texture updates
     // are driven by an external process.
     static scoped_refptr<TextureLayerChromium> create(TextureLayerChromiumClient*);
 
     void clearClient() { m_client = 0; }
 
-    virtual PassOwnPtr<CCLayerImpl> createCCLayerImpl() OVERRIDE;
+    virtual scoped_ptr<CCLayerImpl> createCCLayerImpl() OVERRIDE;
 
     // Sets whether this texture should be Y-flipped at draw time. Defaults to true.
     void setFlipped(bool);
 
     // Sets a UV transform to be used at draw time. Defaults to (0, 0, 1, 1).
     void setUVRect(const FloatRect&);
 
     // Sets whether the alpha channel is premultiplied or unpremultiplied. Defaults to true.
     void setPremultipliedAlpha(bool);
 
@@ skipping 27 matching lines @@
     bool m_rateLimitContext;
     bool m_contextLost;
 
     unsigned m_textureId;
 };
 
 }
 #endif // USE(ACCELERATED_COMPOSITING)
 
 #endif