Adds MediaClientAndroid to support embedder/MediaDrmBridge interaction.

media/base/android/media_client_android.cc

+// 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.
+
+#include "media/base/android/media_client_android.h"
+
+#include "base/logging.h"
+#include "base/stl_util.h"
+
+namespace media {
+
+static MediaClientAndroid* g_media_client = nullptr;
+
+void SetMediaClientAndroid(MediaClientAndroid* media_client) {
+  DCHECK(!g_media_client);
+  g_media_client = media_client;
+}
+
+MediaClientAndroid* GetMediaClientAndroid() {
+  return g_media_client;
+}
+
+MediaClientAndroid::MediaClientAndroid() {
+}
+
+MediaClientAndroid::~MediaClientAndroid() {
+}
+
+const base::hash_map<std::string, UUID>&
+MediaClientAndroid::GetKeySystemUUIDMappings() const {
+  return key_system_uuid_map_;
+}
+
+media::MediaDrmBridgeDelegate* MediaClientAndroid::GetMediaDrmBridgeDelegate(
+    const std::vector<uint8_t>& scheme_uuid) const {
+  return nullptr;
+}
+
+void MediaClientAndroid::AddKeySystemUUIDMapping(
+    const std::string& key_system, const UUID& scheme_uuid) {
+  DCHECK(!ContainsKey(key_system_uuid_map_, key_system))
+      << "Shouldn't overwrite an existing key system.";
+  key_system_uuid_map_[key_system] = scheme_uuid;
+}
+
+}  // namespace media