AndroidOverlay implementation using Dialog.

media/base/android/android_overlay.h

Index: media/base/android/android_overlay.h
diff --git a/media/base/android/android_overlay.h b/media/base/android/android_overlay.h
index 24201f10a9d0c0578c3062742244c0da4498d676..728a0b3476195ea7758f678acd6296fa775cfb23 100644
--- a/media/base/android/android_overlay.h
+++ b/media/base/android/android_overlay.h
@@ -60,6 +60,9 @@ class MEDIA_EXPORT AndroidOverlay {
 
     gfx::Rect rect;
 
+    // Require a secure overlay?
+    bool secure = false;
+
     ReadyCB ready_cb;
     FailedCB failed_cb;
     DestroyedCB destroyed_cb;
@@ -80,6 +83,10 @@ class MEDIA_EXPORT 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_