Fix a bug that mime type isn't passed when checking Codec capabilities

Fix a bug that mime type isn't passed when checking Codec capabilities

Chrome is passing wrong MIME type when checking vp8/9 codec capability.
We should use video/x-vnd.on2.vp8, but using vp8 instead.
This is a simple fix so that it can be easily merged.
An improvement of the CL can be found at https://codereview.chromium.org/1897003002

TBR=timav@chromium.org
BUG=603162
Committed: https://crrev.com/a4631e6a7033e606cd29d662dbb040e8e1ceb4fe
Cr-Commit-Position: refs/heads/master@{#388066}

[qinmin, 2016-04-18 21:51:58]

The CQ bit was checked by qinmin@chromium.org

[commit-bot: I haz the power, 2016-04-18 21:52:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1900843003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1900843003/1

[ddorwin, 2016-04-18 21:59:17]

ddorwin@chromium.org changed reviewers:
+ ddorwin@chromium.org

[ddorwin, 2016-04-18 21:59:17]

lgtm

[commit-bot: I haz the power, 2016-04-18 23:06:52]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-18 23:08:32]

Description was changed from

==========
Fix a bug that mime type isn't passed when checking Codec capabilities

Chrome is passing wrong MIME type when checking vp8/9 codec capability.
We should use video/x-vnd.on2.vp8, but using vp8 instead.
This is a simple fix so that it can be easily merged.
An improvement of the CL can be found at
https://codereview.chromium.org/1897003002

TBR=timav@chromium.org
BUG=603162
==========

to

==========
Fix a bug that mime type isn't passed when checking Codec capabilities

Chrome is passing wrong MIME type when checking vp8/9 codec capability.
We should use video/x-vnd.on2.vp8, but using vp8 instead.
This is a simple fix so that it can be easily merged.
An improvement of the CL can be found at
https://codereview.chromium.org/1897003002

TBR=timav@chromium.org
BUG=603162

Committed: https://crrev.com/a4631e6a7033e606cd29d662dbb040e8e1ceb4fe
Cr-Commit-Position: refs/heads/master@{#388066}
==========

[commit-bot: I haz the power, 2016-04-18 23:08:33]

Patchset 1 (id:??) landed as
https://crrev.com/a4631e6a7033e606cd29d662dbb040e8e1ceb4fe
Cr-Commit-Position: refs/heads/master@{#388066}

[mikecase (-- gone --), 2016-04-19 22:49:48]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1898353002/ by mikecase@chromium.org.

The reason for reverting is: CL cause of crbug/604917
Locally reverted this CL to confirm.