Adds MediaClientAndroid to support embedder/MediaDrmBridge interaction.

components/cdm/browser/widevine_drm_delegate_android.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 COMPONENTS_CDM_BROWSER_WIDEVINE_DRM_DELEGATE_ANDROID_H_
+#define COMPONENTS_CDM_BROWSER_WIDEVINE_DRM_DELEGATE_ANDROID_H_
+
+#include "base/macros.h"
+#include "media/base/android/media_drm_bridge.h"
+
+namespace cdm {
+
+class WidevineDrmDelegateAndroid : public media::MediaDrmBridge::Delegate {
+ public:
+  // Installs WidevineDrmDelegateAndroid into MediaDrmBridge, associated with
+  // |kWidevineKeySystem|.
+  static void Install();
+
+ private:
+  WidevineDrmDelegateAndroid();
+  ~WidevineDrmDelegateAndroid() override;
+
+  // media::MediaDrmBridge::Delegate implementation:
+  bool OnCreateSession(
+      const media::EmeInitDataType init_data_type,
+      const uint8* init_data,
+      int init_data_length,
+      std::vector<uint8>& init_data_out,
+      std::vector<std::string>& optional_parameters_out) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WidevineDrmDelegateAndroid);
+};
+
+}  // namespace cdm
+
+#endif  // COMPONENTS_CDM_BROWSER_WIDEVINE_DRM_DELEGATE_ANDROID_H_