Use correct path for remote_assistance_host

BUG=309844

Review URL: https://codereview.chromium.org/147273003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248607 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248607
Allow Google Now on all Desktop OS Platforms

With the addition of Linux support for rich notifications, we can turn on
Google Now for all desktop platforms.

BUG=164227
R=skare@chromium.org

Review URL: https://codereview.chromium.org/147273005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248609 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248609