Introducing the activityLogPrivate.deleteActivities() API
call. The call takes an array of activity IDs (each activity
ID is a string) and deletes the matching activities form the
Activity Log database.

BUG=330210

Review URL: https://codereview.chromium.org/154053004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251311 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251311