[cc] Store CCLayerImpls as scoped_ptrs

cc/CCVideoLayerImpl.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 CCVideoLayerImpl_h
 #define CCVideoLayerImpl_h
 
 #include "CCLayerImpl.h"
 #include "GraphicsContext3D.h"
 #include "IntSize.h"
 #include <public/WebTransformationMatrix.h>
 #include <public/WebVideoFrameProvider.h>
 
 namespace WebKit {
 class WebVideoFrame;
 }
 
 namespace cc {
 
 class CCLayerTreeHostImpl;
 class CCVideoLayerImpl;
 
 class CCVideoLayerImpl : public CCLayerImpl
                        , public WebKit::WebVideoFrameProvider::Client {
 public:
-    static PassOwnPtr<CCVideoLayerImpl> create(int id, WebKit::WebVideoFrameProvider* provider)
+    static scoped_ptr<CCVideoLayerImpl> create(int id, WebKit::WebVideoFrameProvider* provider)
     {
-        return adoptPtr(new CCVideoLayerImpl(id, provider));
+        return make_scoped_ptr(new CCVideoLayerImpl(id, provider));
     }
     virtual ~CCVideoLayerImpl();
 
     virtual void willDraw(CCResourceProvider*) OVERRIDE;
     virtual void appendQuads(CCQuadSink&, CCAppendQuadsData&) OVERRIDE;
     virtual void didDraw(CCResourceProvider*) OVERRIDE;
 
     virtual void dumpLayerProperties(std::string*, int indent) const OVERRIDE;
 
     Mutex& providerMutex() { return m_providerMutex; }
@@ skipping 41 matching lines @@
     GC3Denum m_format;
     CCResourceProvider::ResourceId m_externalTextureResource;
 
     // Each index in this array corresponds to a plane in WebKit::WebVideoFrame.
     FramePlane m_framePlanes[WebKit::WebVideoFrame::maxPlanes];
 };
 
 }
 
 #endif // CCVideoLayerImpl_h