Revert 181532 "Gardening: Fix tests failing on Win7(dbg) caused ..."

> Gardening: Fix tests failing on Win7(dbg) caused by hitting an assert in FontCache::addSideloadedFontForTesting
> 
> NOTRY=true
> TBR=arv@chromium.org,tkent@chromium.org
> BUG=None
> 
> Review URL: https://codereview.chromium.org/549013002

TBR=keishi@chromium.org

Review URL: https://codereview.chromium.org/554543002

git-svn-id: svn://svn.chromium.org/blink/trunk@181533 bbb929c8-8fbe-4397-9dbb-9b2b20218538