Adds MediaClientAndroid to support embedder/MediaDrmBridge interaction.

media/base/android/media_drm_bridge_delegate.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 MEDIA_BASE_ANDROID_MEDIA_DRM_BRIDGE_DELEGATE_H_
+#define MEDIA_BASE_ANDROID_MEDIA_DRM_BRIDGE_DELEGATE_H_
+
+#include <string>
+#include <vector>
+
+#include "base/macros.h"
+#include "media/base/android/media_client_android.h"
+#include "media/base/eme_constants.h"
+#include "media/base/media_export.h"
+
+namespace media {
+
+// Allows embedders to modify the Android MediaDrm flow. Delegates are
+// registered to a specific key system.
+class MEDIA_EXPORT MediaDrmBridgeDelegate {
+ public:
+  MediaDrmBridgeDelegate();
+  virtual ~MediaDrmBridgeDelegate();
+
+  // Returns the UUID of the DRM scheme that this delegate applies to.
+  virtual const UUID GetUUID() const = 0;
+
+  // Invoked from CreateSession.
+  // If |init_data_out| is filled, it replaces |init_data| to send to the
+  // MediaDrm instance.
+  // If |optional_parameters_out| is filled, it is expected to be an
+  // even-length list of (key, value) pairs to send to the MediaDrm instance.
+  // Returns false if the request should be rejected.
+  virtual bool OnCreateSession(
+      const EmeInitDataType init_data_type,
+      const std::vector<uint8_t>& init_data,
+      std::vector<uint8_t>* init_data_out,
+      std::vector<std::string>* optional_parameters_out);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MediaDrmBridgeDelegate);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_BASE_ANDROID_MEDIA_DRM_BRIDGE_DELEGATE_H_