Roll clang r135314:135823 Picking up fix for -Wsign-compare (135664).
Roll clang r135314:135823
Picking up fix for -Wsign-compare (135664).

BUG=none
TEST=trybots

Review URL: http://codereview.chromium.org/7488030
Patch from Ami Fischman <fischman@chromium.org>.

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@93831 0039d316-1c4b-4281-b951-d872f2087c98

ropik/chromium,adobe/chromium,ropik/chromium,ropik/chromium,yitian134/chromium,adobe/chromium,gavinp/chromium,gavinp/chromium,gavinp/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,yitian134/chromium,gavinp/chromium,ropik/chromium,ropik/chromium,gavinp/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,ropik/chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,yitian134/chromium,adobe/chromium,yitian134/chromium