Adds initial key systems support for Chromecast.

chromecast/shell/renderer/key_systems_cast.cc

Index: chromecast/shell/renderer/key_systems_cast.cc
diff --git a/chromecast/shell/renderer/key_systems_cast.cc b/chromecast/shell/renderer/key_systems_cast.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8e9fe4d61c30d01a7c343e5dd7d1c45e514d7bd8
--- /dev/null
+++ b/chromecast/shell/renderer/key_systems_cast.cc
@@ -0,0 +1,48 @@
+// 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.
+
+#include "chromecast/shell/renderer/key_systems_cast.h"
+
+#include <string>
+
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "chromecast/media/base/key_systems_common.h"
+#include "components/cdm/renderer/widevine_key_systems.h"
+#include "content/public/common/eme_codec.h"
+
+#include "widevine_cdm_version.h" // In SHARED_INTERMEDIATE_DIR.
+
+namespace {
+
+#if defined(PLAYREADY_CDM_AVAILABLE)
+void AddKeySystemWithCodecs(
+    const std::string& key_system_name,
+    std::vector<content::KeySystemInfo>* concrete_key_systems) {
+  content::KeySystemInfo info(key_system_name);
+  info.supported_codecs = content::EME_CODEC_MP4_ALL;
+  concrete_key_systems->push_back(info);
+}
+#endif  // defined(PLAYREADY_CDM_AVAILABLE)
+
+}  // namespace
+
+namespace chromecast {
+namespace shell {
+
+void AddChromecastKeySystems(
+    std::vector<content::KeySystemInfo>* key_systems_info) {
+#if defined(WIDEVINE_CDM_AVAILABLE)
+  AddWidevineWithCodecs(cdm::WIDEVINE,
+                        content::EME_CODEC_MP4_ALL,
+                        key_systems_info);
+#endif
+
+#if defined(PLAYREADY_CDM_AVAILABLE)
+  AddKeySystemWithCodecs(kChromecastPlayreadyKeySystem, key_systems_info);
+#endif
+}
+
+}  // namespace shell
+}  // namespace chromecast