[Media Router] Remove unnecessary CONTENT_EXPORT.

[Media Router] Remove unnecessary CONTENT_EXPORT.

BUG=504938
NOTRY=true
TBR=mfoltz

Committed: https://crrev.com/99c0c42ae1505d01cf0887bc74f164eb78750aeb
Cr-Commit-Position: refs/heads/master@{#338377}

[imcheng, 2015-07-10 21:45:32]

imcheng@chromium.org changed reviewers:
+ imcheng@chromium.org, thakis@chromium.org

[Nico, 2015-07-10 21:46:33]

lgtm, thanks!

[imcheng (use chromium acct), 2015-07-10 21:46:43]

The CQ bit was checked by imcheng@google.com

[commit-bot: I haz the power, 2015-07-10 21:46:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1232063005/1

[imcheng, 2015-07-10 21:56:55]

imcheng@chromium.org changed reviewers:
+ mfoltz@chromium.org

[imcheng, 2015-07-10 21:56:55]

+mfoltz for OWNERS

[commit-bot: I haz the power, 2015-07-10 21:59:21]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-07-10 21:59:22]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[Nico, 2015-07-10 22:00:53]

mfoltz, I put you as TBR as this is a build fix and a pretty simple change.

[Nico, 2015-07-10 22:00:56]

The CQ bit was checked by thakis@chromium.org

[commit-bot: I haz the power, 2015-07-10 22:03:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1232063005/1

[commit-bot: I haz the power, 2015-07-10 22:09:19]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-10 22:10:14]

Patchset 1 (id:??) landed as
https://crrev.com/99c0c42ae1505d01cf0887bc74f164eb78750aeb
Cr-Commit-Position: refs/heads/master@{#338377}

[imcheng, 2015-07-10 23:10:33]

I sent out a fix for another issue (missing & in unit test):
https://codereview.chromium.org/1230793010

[mark a. foltz, 2015-07-10 23:32:04]

lgtm