Fix remaining incompatibilities between scoped_ptr and unique_ptr.

content/browser/compositor/delegated_frame_host.h

Index: content/browser/compositor/delegated_frame_host.h
diff --git a/content/browser/compositor/delegated_frame_host.h b/content/browser/compositor/delegated_frame_host.h
index 21dc4e0c8f95341b2ca5e2cbbdbcb27b28ed4bf4..d1237afa01148081227773243c8e214e9fefa748 100644
--- a/content/browser/compositor/delegated_frame_host.h
+++ b/content/browser/compositor/delegated_frame_host.h
@@ -155,7 +155,7 @@ class CONTENT_EXPORT DelegatedFrameHost
   void BeginFrameSubscription(
       scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber);
   void EndFrameSubscription();
-  bool HasFrameSubscriber() const { return frame_subscriber_; }
+  bool HasFrameSubscriber() const { return !!frame_subscriber_; }
   uint32_t GetSurfaceIdNamespace();
   // Returns a null SurfaceId if this DelegatedFrameHost has not yet created
   // a compositor Surface.