WeakPtr destruction order cleanup: media edition.

content/renderer/media/video_capture_impl_manager.h

Index: content/renderer/media/video_capture_impl_manager.h
diff --git a/content/renderer/media/video_capture_impl_manager.h b/content/renderer/media/video_capture_impl_manager.h
index 9a5e0c26472e313b91216606c0843171c4bac272..6b02825a7aa9e549fc72da4c79075f962f988fc5 100644
--- a/content/renderer/media/video_capture_impl_manager.h
+++ b/content/renderer/media/video_capture_impl_manager.h
@@ -101,10 +101,13 @@ class CONTENT_EXPORT VideoCaptureImplManager {
 
   scoped_refptr<VideoCaptureMessageFilter> filter_;
 
-  // Following two members are bound to the render thread.
-  base::WeakPtrFactory<VideoCaptureImplManager> weak_factory_;
+  // Bound to the render thread.
   base::ThreadChecker thread_checker_;
 
+  // Bound to the render thread.
+  // NOTE: Weak pointers must be invalidated before all other member variables.
+  base::WeakPtrFactory<VideoCaptureImplManager> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureImplManager);
 };