Ignore certain messages in plugin broker process if they are not sent by the browser.

Ignore certain messages in plugin broker process if they are not sent by the browser.

BUG=610600
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation

Review-Url: https://codereview.chromium.org/2069853002
Cr-Commit-Position: refs/heads/master@{#400495}
(cherry picked from commit 92cad45212731b59e74c8f2a2913691db3e9d770)

Committed: https://chromium.googlesource.com/chromium/src/+/a803c8e2cdd77727d2e9ba2e39ad6f69fcd9de1d

[yzshen1, 2016-07-06 20:44:45]

Description was changed from

==========
Ignore certain messages in plugin broker process if they are not sent by the
browser.

BUG=610600
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation

Review-Url: https://codereview.chromium.org/2069853002
Cr-Commit-Position: refs/heads/master@{#400495}
(cherry picked from commit 92cad45212731b59e74c8f2a2913691db3e9d770)
==========

to

==========
Ignore certain messages in plugin broker process if they are not sent by the
browser.

BUG=610600
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation

Review-Url: https://codereview.chromium.org/2069853002
Cr-Commit-Position: refs/heads/master@{#400495}
(cherry picked from commit 92cad45212731b59e74c8f2a2913691db3e9d770)

Committed:
https://chromium.googlesource.com/chromium/src/+/a803c8e2cdd77727d2e9ba2e39ad...
==========

[yzshen1, 2016-07-06 20:44:46]

Committed patchset #1 (id:1) manually as
a803c8e2cdd77727d2e9ba2e39ad6f69fcd9de1d.