[cc] Store CCLayerImpls as scoped_ptrs

cc/CCVideoLayerImpl.h

Index: cc/CCVideoLayerImpl.h
diff --git a/cc/CCVideoLayerImpl.h b/cc/CCVideoLayerImpl.h
index 814513ecb4e8d489197e1cedf4ba35c684aefd03..b254e8c50b0d3b59241c6a09cbe9158e1868f166 100644
--- a/cc/CCVideoLayerImpl.h
+++ b/cc/CCVideoLayerImpl.h
@@ -23,9 +23,9 @@ 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();