Call didAccessInitialDocument when javascript: URLs are used.

BUG=265221
TEST=See bug for repro.

Review URL: https://chromiumcodereview.appspot.com/22572004

git-svn-id: svn://svn.chromium.org/blink/trunk@155790 bbb929c8-8fbe-4397-9dbb-9b2b20218538
        bool Equals(Notification* other)
        {
            return other && frame == other->frame && context == other->context && worldId == other->worldId;
        }

        bool Equals(Notification* other)
        {
            return other && frame == other->frame && context == other->context && worldId == other->worldId;
        }
