Monitor VideoResourceUpdater reusing destructed resource in Debug mode.

media/base/video_frame_metadata.h

Index: media/base/video_frame_metadata.h
diff --git a/media/base/video_frame_metadata.h b/media/base/video_frame_metadata.h
index 12112a43ad0efc8969340ec539acf36698c8aafd..e8129b1ed7c0ab1dd27ca83a3fc2204d7e388662 100644
--- a/media/base/video_frame_metadata.h
+++ b/media/base/video_frame_metadata.h
@@ -76,6 +76,10 @@ class MEDIA_EXPORT VideoFrameMetadata {
     // Use Get/SetTimeTicks() for this key.
     REFERENCE_TIME,
 
+    // Boolean used by cc::VideoResourceUpdater to flag that this video frame's
+    // content has been cached.
+    RESOURCE_UPDATER_FLAG,

[xhwang, 2016/02/23 17:58:02]

Also, media/base knows nothing about "cc" and "ResourceUpdater", can we have a
more meaningful name for this flag?

[xjz, 2016/02/23 23:53:15]

Removed this flag here. Instead, use base::SupportsUserData to set the userdata
in VideoFrame. media/base does not need to take care of it.

+
     // A feedback signal that indicates the fraction of the tolerable maximum
     // amount of resources that were utilized to process this frame.  A producer
     // can check this value after-the-fact, usually via a VideoFrame destruction