mash: Change the MediaDelegate to a Media{Controller,Client}.

chrome/browser/ui/ash/media_client.h

Index: chrome/browser/ui/ash/media_client.h
diff --git a/chrome/browser/ui/ash/media_client.h b/chrome/browser/ui/ash/media_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..cfcc72dbc817746530c23a14a81200de96b3c0b4
--- /dev/null
+++ b/chrome/browser/ui/ash/media_client.h
@@ -0,0 +1,47 @@
+// Copyright 2014 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 CHROME_BROWSER_UI_ASH_MEDIA_CLIENT_H_
+#define CHROME_BROWSER_UI_ASH_MEDIA_CLIENT_H_
+
+#include "ash/public/interfaces/media.mojom.h"
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "chrome/browser/media/webrtc/media_capture_devices_dispatcher.h"
+#include "mojo/public/cpp/bindings/associated_binding.h"
+
+class MediaClient : public ash::mojom::MediaClient,
+                    MediaCaptureDevicesDispatcher::Observer {
+ public:
+  MediaClient();
+  ~MediaClient() override;
+
+  // ash::MediaClient:
+  void HandleMediaNextTrack() override;
+  void HandleMediaPlayPause() override;
+  void HandleMediaPrevTrack() override;
+  void RequestCaptureState() override;
+
+  // MediaCaptureDevicesDispatcher::Observer:
+  void OnRequestUpdate(int render_process_id,
+                       int render_frame_id,
+                       content::MediaStreamType stream_type,
+                       const content::MediaRequestState state) override;
+
+ private:
+  // Returns the media capture state for the current user at
+  // |user_index|. (Note that this isn't stable, see implementation comment on
+  // RequestCaptureState()).
+  ash::mojom::MediaCaptureState GetMediaCaptureStateByIndex(int user_index);
+
+  ash::mojom::MediaControllerPtr media_controller_;
+
+  mojo::AssociatedBinding<ash::mojom::MediaClient> binding_;
+
+  base::WeakPtrFactory<MediaClient> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaClient);
+};
+
+#endif  // CHROME_BROWSER_UI_ASH_MEDIA_CLIENT_H_