Initialize the CDM asynchronously

content/renderer/media/crypto/cdm_initialized_promise.h

+// Copyright 2015 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 CONTENT_RENDERER_MEDIA_CRYPTO_CDM_INITIALIZED_PROMISE_H_
+#define CONTENT_RENDERER_MEDIA_CRYPTO_CDM_INITIALIZED_PROMISE_H_
+
+#include <string>
+
+#include "base/memory/scoped_ptr.h"
+#include "media/base/cdm_factory.h"
+#include "media/base/cdm_promise.h"
+#include "media/base/media_keys.h"
+
+namespace content {
+
+// Promise to be resolved when the CDM is initialized. It owns the MediaKeys
+// object until the initialization completes, which it then passes to
+// |cdm_created_cb|.
+class CdmInitializedPromise : public media::SimpleCdmPromise {
+ public:
+  CdmInitializedPromise(const media::CdmCreatedCB& cdm_created_cb,
+                        scoped_ptr<media::MediaKeys> cdm);
+  ~CdmInitializedPromise() override;
+
+  // SimpleCdmPromise implementation.
+  void resolve() override;
+  void reject(media::MediaKeys::Exception exception_code,
+              uint32 system_code,
+              const std::string& error_message) override;
+
+ private:
+  media::CdmCreatedCB cdm_created_cb_;
+  scoped_ptr<media::MediaKeys> cdm_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_CRYPTO_CDM_INITIALIZED_PROMISE_H_