The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ecc0efe17c70826d23c9aa5b9e2913eba8899838

commit ecc0efe17c70826d23c9aa5b9e2913eba8899838
Author: guidou <guidou@chromium.org>
Date: Fri Apr 15 12:15:45 2016

Do not use a persistent reference to store srcObject in HTMLMediaElement.

The persistent reference could lead to unexpected leaks due to reference cycles.

BUG= 603493 

Review URL: https://codereview.chromium.org/1886333002

Cr-Commit-Position: refs/heads/master@{#387581}

[modify] https://crrev.com/ecc0efe17c70826d23c9aa5b9e2913eba8899838/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
[modify] https://crrev.com/ecc0efe17c70826d23c9aa5b9e2913eba8899838/third_party/WebKit/Source/core/html/HTMLMediaElement.h
[modify] https://crrev.com/ecc0efe17c70826d23c9aa5b9e2913eba8899838/third_party/WebKit/Source/modules/srcobject/HTMLMediaElementSrcObject.cpp
[modify] https://crrev.com/ecc0efe17c70826d23c9aa5b9e2913eba8899838/third_party/WebKit/Source/platform/exported/WebMediaPlayerSource.cpp
[modify] https://crrev.com/ecc0efe17c70826d23c9aa5b9e2913eba8899838/third_party/WebKit/public/platform/WebMediaPlayerSource.h