Add multiple destruction callbacks to AndroidOverlay.

media/base/android_overlay_config.h

 // Copyright 2017 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.
 
 #ifndef MEDIA_BASE_ANDROID_OVERLAY_CONFIG_H_
 #define MEDIA_BASE_ANDROID_OVERLAY_CONFIG_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "media/base/media_export.h"
@@ skipping 24 matching lines @@
 
   // Initial rectangle for the overlay.  May be changed via ScheduleLayout().
   gfx::Rect rect;
 
   // Require a secure overlay?
   bool secure = false;
 
   // Convenient helpers since the syntax is weird.
   void is_ready(AndroidOverlay* overlay) { std::move(ready_cb).Run(overlay); }
   void is_failed(AndroidOverlay* overlay) { std::move(failed_cb).Run(overlay); }
-  void is_destroyed(AndroidOverlay* overlay) {
-    std::move(destroyed_cb).Run(overlay);
-  }
 
   ReadyCB ready_cb;
   FailedCB failed_cb;
-  DestroyedCB destroyed_cb;
 
   DISALLOW_COPY(AndroidOverlayConfig);
 };
 
 // Common factory type.
 using AndroidOverlayFactoryCB =
     base::RepeatingCallback<std::unique_ptr<AndroidOverlay>(
         AndroidOverlayConfig)>;
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_OVERLAY_CONFIG_H_