Replace SupportsWeakPtr with WeakPtrFactory in VideoResourceUpdater

cc/resources/video_resource_updater.h

Index: cc/resources/video_resource_updater.h
diff --git a/cc/resources/video_resource_updater.h b/cc/resources/video_resource_updater.h
index f36ae95f2136741915e8092ece0f8883a88a52c9..c00b9fc0b0cffd94f78a9b617f9d7a2490569eb1 100644
--- a/cc/resources/video_resource_updater.h
+++ b/cc/resources/video_resource_updater.h
@@ -70,8 +70,7 @@ class CC_EXPORT VideoFrameExternalResources {
 
 // VideoResourceUpdater is used by the video system to produce frame content as
 // resources consumable by the compositor.
-class CC_EXPORT VideoResourceUpdater
-    : public base::SupportsWeakPtr<VideoResourceUpdater> {
+class CC_EXPORT VideoResourceUpdater {
  public:
   VideoResourceUpdater(ContextProvider* context_provider,
                        ResourceProvider* resource_provider,
@@ -185,6 +184,8 @@ class CC_EXPORT VideoResourceUpdater
   // data transfers.
   ResourceList all_resources_;
 
+  base::WeakPtrFactory<VideoResourceUpdater> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(VideoResourceUpdater);
 };