Revert 254746 "Disable HostDriven_SyncTest.testDisableAndEnableSync"

> Disable HostDriven_SyncTest.testDisableAndEnableSync
> 
> This is failing on the android debug builder
> http://build.chromium.org/p/chromium.linux/buildstatus?builder=Android%20Tests%20%28dbg%29&number=18942
> 
> I am not able to figure out which cl caused this, but it started here:
> http://build.chromium.org/p/chromium.linux/builders/Android%20Tests%20%28dbg%29/builds/18939
> 
> Filed issue 348951 to track this
> 
> Review URL: https://codereview.chromium.org/177903011

TBR=ricow@chromium.org

Review URL: https://codereview.chromium.org/178473028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254748 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254748