Remove old code around WEBPERMISSIONCLIENT_USES_FRAME_FOR_ALL_METHODS from Blink since the Chrome code has switched over to the new API.

BUG=304341
R=jochen@chromium.org

Review URL: https://codereview.chromium.org/103053013

git-svn-id: svn://svn.chromium.org/blink/trunk@164027 bbb929c8-8fbe-4397-9dbb-9b2b20218538