Add Mojo CDM Service.

media/mojo/services/mojo_cdm_promise.h

+// 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 MEDIA_MOJO_SERVICES_MOJO_CDM_PROMISE_H_
+#define MEDIA_MOJO_SERVICES_MOJO_CDM_PROMISE_H_
+
+#include "base/macros.h"
+#include "media/base/cdm_promise.h"
+#include "media/mojo/interfaces/content_decryption_module.mojom.h"
+#include "media/mojo/services/mojo_type_trait.h"
+#include "mojo/public/cpp/bindings/callback.h"
+
+namespace media {
+
+// media::CdmPromiseTemplate implementations backed by mojo::Callbacks.
+template <typename... T>
+class MojoCdmPromise : public CdmPromiseTemplate<T...> {
+ public:
+  typedef mojo::Callback<void(mojo::CdmPromiseResultPtr,
+                              typename MojoTypeTrait<T>::MojoType...)>
+      CallbackType;
+
+  MojoCdmPromise(const CallbackType& callback);
+  ~MojoCdmPromise() final;
+
+  // CdmPromiseTemplate<> implementation.
+  void resolve(const T&... result) final;
+  void reject(MediaKeys::Exception exception,
+              uint32_t system_code,
+              const std::string& error_message) final;
+
+ private:
+  CallbackType callback_;
+};
+
+}  // namespace media
+
+#endif  // MEDIA_MOJO_SERVICES_MOJO_CDM_PROMISE_H_