Abstracted AutofillMsg_AcceptDataListSuggestion IPC out of core autofill code.

BUG=302474

Review URL: https://codereview.chromium.org/59703005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233888 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233888