Disable 'clang_use_chrome_plugins' on Windows

Clang plugins don't work on Windows currently, and when Blink r173367
enabled the Oilpan GC plugin by default, it broke all the Win Clang FYI
builders. This should fix that.

BUG=82385
NOTRY=true

Review URL: https://codereview.chromium.org/268833009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@268600 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed