The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0d99ea0a684a3e463a19d9d99f1c0d0a49099f48

commit 0d99ea0a684a3e463a19d9d99f1c0d0a49099f48
Author: zqzhang <zqzhang@chromium.org>
Date: Wed Mar 29 11:34:05 2017

Simplify Context usage in MediaNotification

Currently the MediaNotification usages Context objects from many
sources, either on service creation, or getting the global
ApplicationContext. Actually, using the global ApplicationContext
should be sufficient.

BUG= 705920 

Review-Url: https://codereview.chromium.org/2783633002
Cr-Commit-Position: refs/heads/master@{#460350}

[modify] https://crrev.com/0d99ea0a684a3e463a19d9d99f1c0d0a49099f48/chrome/android/java/src/org/chromium/chrome/browser/media/remote/CastNotificationControl.java
[modify] https://crrev.com/0d99ea0a684a3e463a19d9d99f1c0d0a49099f48/chrome/android/java/src/org/chromium/chrome/browser/media/router/cast/CastSessionImpl.java
[modify] https://crrev.com/0d99ea0a684a3e463a19d9d99f1c0d0a49099f48/chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaNotificationManager.java
[modify] https://crrev.com/0d99ea0a684a3e463a19d9d99f1c0d0a49099f48/chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaSessionTabHelper.java