Fix media media_blink_unittest

Fix media media_blink_unittest

VideoFrameCompositorTest.NaturalSizeChanged & VideoFrameCompositorTest.OpacityChanged broke
while the tests were not running. Most likely because of https://codereview.chromium.org/1299523002/
This fixes the test.

Committed: https://crrev.com/602856aa62634b5d70a4b22a6908f2d017b93ab4
Cr-Commit-Position: refs/heads/master@{#348938}

[hubbe, 2015-09-15 17:48:24]

hubbe@chromium.org changed reviewers:
+ dalecurtis@google.com

[hubbe, 2015-09-15 17:48:25]

I'm not entirely certain this is the *right* way to fix the test, but it
works....

[hubbe, 2015-09-15 17:48:36]

hubbe@chromium.org changed reviewers:
+ dalecurtis@chromium.org
- dalecurtis@google.com

[hubbe, 2015-09-15 17:48:59]

I'm not entirely certain this is the *right* way to fix the test, but it
works....

[DaleCurtis, 2015-09-15 18:07:46]

This is the correct fix after the previous change. Thanks!

lgtm

[hubbe, 2015-09-15 18:11:45]

The CQ bit was checked by hubbe@chromium.org

[commit-bot: I haz the power, 2015-09-15 18:12:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1339373003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1339373003/1

[commit-bot: I haz the power, 2015-09-15 18:24:25]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-15 18:25:31]

Patchset 1 (id:??) landed as
https://crrev.com/602856aa62634b5d70a4b22a6908f2d017b93ab4
Cr-Commit-Position: refs/heads/master@{#348938}

[commit-bot: I haz the power, 2015-09-23 12:47:07]

Patchset 1 (id:??) landed as
https://crrev.com/602856aa62634b5d70a4b22a6908f2d017b93ab4
Cr-Commit-Position: refs/heads/master@{#348938}