Revert 239601 "[rAC,OSX] requestAutocomplete is always off by de..."

> [rAC,OSX] requestAutocomplete is always off by default
> 
> Only needed for merge to M32 - will be reverted after it lands in the
> branch
> 
> BUG=326757
> R=thestig@chromium.org
> TBR=groby@chromium.org
> 
> Review URL: https://codereview.chromium.org/110863002

TBR=dbeam@chromium.org

Review URL: https://codereview.chromium.org/108103003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239607 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239607