Revert 276680 "Roll webrtc & libjingle 6352:6406."
Broke Android bots runhooks:
http://build.chromium.org/p/chromium/builders/Android/builds/24889
> Roll webrtc & libjingle 6352:6406.
>
> This CL is a takeover of https://codereview.chromium.org/
329773004/
>
> NOTRY=true
>
> TBR=ronghuawu@chromium.org
>
> Review URL: https://codereview.chromium.org/
328303002
TBR=xians@chromium.org
Review URL: https://codereview.chromium.org/
333693002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@276693 0039d316-1c4b-4281-b951-d872f2087c98