AndroidOverlay implementation using Dialog.

media/base/android/android_overlay.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_ANDROID_OVERLAY_H_
 #define MEDIA_BASE_ANDROID_ANDROID_OVERLAY_H_
 
 #include "base/android/scoped_java_ref.h"
 #include "base/callback.h"
 #include "base/macros.h"
@@ skipping 42 matching lines @@
    public:
     Config();
     Config(const Config&);
     ~Config();
 
     // Implementation-specific token.
     base::UnguessableToken routing_token;
 
     gfx::Rect rect;
 
+    // Require a secure overlay?
+    bool secure = false;
+
     ReadyCB ready_cb;
     FailedCB failed_cb;
     DestroyedCB destroyed_cb;
   };
 
   virtual ~AndroidOverlay() {}
 
   // Schedules a relayout of this overlay.  If called before the client is
   // notified that the surface is created, then the call will be ignored.
   virtual void ScheduleLayout(const gfx::Rect& rect) = 0;
 
   // May be called during / after ReadyCB and before DestroyedCB.
   virtual const base::android::JavaRef<jobject>& GetJavaSurface() const = 0;
 
  protected:
   AndroidOverlay() {}
 
   DISALLOW_COPY_AND_ASSIGN(AndroidOverlay);
 };
 
+// Handy callback type to provide a routing token.
+using RoutingTokenCallback =
+    base::Callback<void(const base::UnguessableToken&)>;
+
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_ANDROID_OVERLAY_H_