Move Filtered/Registered Events out of ExtensionPrefs into EventRouter

BUG=180083

Review URL: https://chromiumcodereview.appspot.com/14762013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@200865 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed