Break up common_custom_types.mojom.

third_party/WebKit/public/platform/modules/mediasession/media_session.mojom

 // Copyright 2016 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.
 
 module blink.mojom;
 
-import "mojo/common/common_custom_types.mojom";
+import "mojo/common/string16.mojom";
 import "ui/gfx/geometry/mojo/geometry.mojom";
 import "url/mojo/url.mojom";
 
 // Spec: https://wicg.github.io/mediasession/
 enum MediaSessionAction {
      PLAY,
      PAUSE,
      PLAY_PAUSE,
      PREVIOUS_TRACK,
      NEXT_TRACK,
@@ skipping 37 matching lines @@
 
   // Notifies the browser that the event handler for |action| has been set,
   // browser needs to show a media button in the UI or register listeners to the
   // platform.
   EnableAction(MediaSessionAction action);
   // Notifies the browser that the event handler for |action| has been set,
   // browser needs to hide the media button in the UI and unregister listeners
   // from the platform.
   DisableAction(MediaSessionAction action);
 };