Media Remoting Clean-up: Less-redundant naming, style consistency, etc.

media/remoting/remoting_sink_observer.h

-// 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.
-
-#ifndef MEDIA_REMOTING_REMOTING_SINK_OBSERVER_H_
-#define MEDIA_REMOTING_REMOTING_SINK_OBSERVER_H_
-
-#include "media/mojo/interfaces/remoting.mojom.h"
-#include "mojo/public/cpp/bindings/binding.h"
-
-namespace media {
-
-// This calss is a pure observer of remoting sink availability to indicate
-// whether a remoting session can be started.
-class RemotingSinkObserver final : public mojom::RemotingSource {
- public:
-  RemotingSinkObserver(mojom::RemotingSourceRequest source_request,
-                       mojom::RemoterPtr remoter);
-  ~RemotingSinkObserver() override;
-
-  mojom::RemotingSinkCapabilities sink_capabilities() const {
-    return sink_capabilities_;
-  }
-
-  bool is_remote_decryption_available() const {
-    return sink_capabilities_ ==
-           mojom::RemotingSinkCapabilities::CONTENT_DECRYPTION_AND_RENDERING;
-  }
-
-  // RemotingSource implementations.
-  void OnSinkAvailable(mojom::RemotingSinkCapabilities capabilities) override;
-  void OnSinkGone() override;
-  void OnStarted() override {}
-  void OnStartFailed(mojom::RemotingStartFailReason reason) override {}
-  void OnMessageFromSink(const std::vector<uint8_t>& message) override {}
-  void OnStopped(mojom::RemotingStopReason reason) override {}
-
- private:
-  const mojo::Binding<mojom::RemotingSource> binding_;
-  const mojom::RemoterPtr remoter_;
-
-  // When the sink is available, this describes its capabilities. When not
-  // available, this is always NONE. Updated by OnSinkAvailable/Gone().
-  mojom::RemotingSinkCapabilities sink_capabilities_ =
-      mojom::RemotingSinkCapabilities::NONE;
-
-  DISALLOW_COPY_AND_ASSIGN(RemotingSinkObserver);
-};
-
-}  // namespace media
-
-#endif  // MEDIA_REMOTING_REMOTING_SINK_OBSERVER_H_