Fix WeakPtrFactory members in Android media classes

content/renderer/media/android/media_source_delegate.h

Index: content/renderer/media/android/media_source_delegate.h
diff --git a/content/renderer/media/android/media_source_delegate.h b/content/renderer/media/android/media_source_delegate.h
index 963237a93d0c5d1f2349b2dfd49baf771b386b02..5e55066bd0177bf705383c874221fb05dc43abb6 100644
--- a/content/renderer/media/android/media_source_delegate.h
+++ b/content/renderer/media/android/media_source_delegate.h
@@ -227,9 +227,9 @@ class MediaSourceDelegate : public media::DemuxerHost {
   const scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
+  base::WeakPtr<MediaSourceDelegate> main_weak_this_;
   base::WeakPtrFactory<MediaSourceDelegate> main_weak_factory_;
   base::WeakPtrFactory<MediaSourceDelegate> media_weak_factory_;
-  base::WeakPtr<MediaSourceDelegate> main_weak_this_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaSourceDelegate);
 };