Rolling chromium_revision 157509:169394

This gives us, among other things:
* updated gtest that compiles with Visual Studio 2012
* newer build tools
* newer Clang compiler.

BUG=none
TEST=all trybots passing.

Review URL: https://webrtc-codereview.appspot.com/973004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3165 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed