Fix default video decoder issue

Fix default video decoder issue

On Android there is no software fallback for the video decoder.  Disable the
fallback path and remove the dependencies.


BUG= https://code.google.com/p/nativeclient/issues/detail?id=3032
R=bbudge@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=282070

[sehr, 2014-07-02 23:06:21]

The nacl.gyp changes may be unrelated.  I'm going to try removing them again. 
Otherwise, PTAL.

[bbudge, 2014-07-05 04:42:59]

content LGTM

[sehr, 2014-07-07 21:18:59]

The CQ bit was checked by sehr@chromium.org

[commit-bot: I haz the power, 2014-07-07 21:21:09]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sehr@chromium.org/364003003/20001

[commit-bot: I haz the power, 2014-07-08 01:49:19]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_aosp on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_aosp/builds/9...)

[commit-bot: I haz the power, 2014-07-08 02:19:10]

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

[commit-bot: I haz the power, 2014-07-08 02:19:11]

Try jobs failed on following builders:
  android_aosp on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_aosp/builds/9...)

[David Yen, 2014-07-09 16:26:45]

The CQ bit was checked by dyen@chromium.org

[commit-bot: I haz the power, 2014-07-09 16:28:28]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sehr@chromium.org/364003003/20001

[sehr, 2014-07-09 17:04:12]

Committed patchset #2 manually as r282070 (presubmit successful).