Fix two notification update issues on page navigation

Fix two notification update issues on page navigation

This CL fixes two issues that causes the notification to update
improperly on navigation:

* The notification should reset for same-origin but non-same-page
  navigation (in Java).
* When the RenderFrameHost navigates away, the MediaSession members
  stored in MediaSessionServiceImpl should also be reset.

BUG=696716
Review-Url: https://codereview.chromium.org/2723803002
Cr-Commit-Position: refs/heads/master@{#453906}
(cherry picked from commit efb50702d432d69e593cf0bafb85ab82093d5395)

Review-Url: https://codereview.chromium.org/2736493002 .
Cr-Commit-Position: refs/branch-heads/2987@{#763}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/11cb9478bc228e4ddb88a916aceabc73ce3e777f

[Zhiqiang Zhang (Slow), 2017-03-04 13:23:39]

Description was changed from

==========
Fix two notification update issues on page navigation

This CL fixes two issues that causes the notification to update
improperly on navigation:

* The notification should reset for same-origin but non-same-page
  navigation (in Java).
* When the RenderFrameHost navigates away, the MediaSession members
  stored in MediaSessionServiceImpl should also be reset.

BUG=696716

Review-Url: https://codereview.chromium.org/2723803002
Cr-Commit-Position: refs/heads/master@{#453906}
(cherry picked from commit efb50702d432d69e593cf0bafb85ab82093d5395)
==========

to

==========
Fix two notification update issues on page navigation

This CL fixes two issues that causes the notification to update
improperly on navigation:

* The notification should reset for same-origin but non-same-page
  navigation (in Java).
* When the RenderFrameHost navigates away, the MediaSession members
  stored in MediaSessionServiceImpl should also be reset.

BUG=696716

Review-Url: https://codereview.chromium.org/2723803002
Cr-Commit-Position: refs/heads/master@{#453906}
(cherry picked from commit efb50702d432d69e593cf0bafb85ab82093d5395)

Review-Url: https://codereview.chromium.org/2736493002 .
Cr-Commit-Position: refs/branch-heads/2987@{#763}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/11cb9478bc228e4ddb88a916acea...
==========

[Zhiqiang Zhang (Slow), 2017-03-04 13:23:41]

Committed patchset #1 (id:1) manually as
11cb9478bc228e4ddb88a916aceabc73ce3e777f.