Revert of Define AudioBuffer and VideoFrame for mojo

Revert of Define AudioBuffer and VideoFrame for mojo (patchset #4 id:60001 of https://codereview.chromium.org/1468153003/ )

Reason for revert:
This looks like it broke the arm buildbot: https://build.chromium.org/p/chromium.linux/builders/Android%20Arm64%20Builder%20%28dbg%29/builds/27229

Original issue's description:
> Define AudioBuffer and VideoFrame for mojo
>
> Adds support so they can be converted to and from the matching classes
> in media::
>
> BUG=510088
> TEST=new tests pass
>
> Committed: https://crrev.com/e45d9fa36a51ed750b71b7543563960962d44a90
> Cr-Commit-Position: refs/heads/master@{#361530}

TBR=xhwang@chromium.org,dalecurtis@chromium.org,jrummell@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=510088
Committed: https://crrev.com/9db7df5bc282f4e3d9fb06a0f9ea73e0fbf2d3af
Cr-Commit-Position: refs/heads/master@{#361554}

[raymes, 2015-11-25 03:36:10]

Created Revert of Define AudioBuffer and VideoFrame for mojo

[commit-bot: I haz the power, 2015-11-25 03:38:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1474843003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1474843003/1

[commit-bot: I haz the power, 2015-11-25 03:41:20]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-25 03:42:39]

Patchset 1 (id:??) landed as
https://crrev.com/9db7df5bc282f4e3d9fb06a0f9ea73e0fbf2d3af
Cr-Commit-Position: refs/heads/master@{#361554}