Chrome roll of libyuv

[GoogleCodeExporter]

update libyuv used by chrome.

webrtc and gtp use the chrome version of libyuv now, so to update those 
projects, chrome requires a roll.

It should be something like

cd d:\src\chrome\src

gclient sync
git checkout master
git pull

cd third_party\libyuv
git fetch origin
cd ..\..

roll-dep third_party/libyuv 1367

optional
git checkout -b my-libyuv-roll
git add DEPS
git commit 
git pull --rebase origin master

Original issue reported on code.google.com by fbarch...@chromium.org on 14 Apr 2015 at 12:56