Suppress uninit reads reported in MSVCP120.dll and MSVCR120.dll.

BUG=349416
TBR=oshima@chromium.org

Review URL: https://codereview.chromium.org/183023009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255035 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255035