Removed chrome.rtcPrivate API.

chrome/common/extensions/api/rtc_private.idl

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// rtcPrivate.
-namespace rtcPrivate {
-  // Launch action type.
-  enum ActionType {chat, voice, video};
-
-  dictionary LaunchIntent {
-    // Launch action.
-    ActionType action;
-
-    // Launch data payload.
-    object data;
-
-    // MIME type.
-    DOMString type;
-  };
-
-  dictionary LaunchData {
-    // Launch intent.
-    LaunchIntent intent;
-  };
-
-  interface Events {
-    // Fired when an RTC launch event is raised.
-    static void onLaunch(optional LaunchData data);
-  };
-};