Add widevine third party

Add 2 new command options to use widevine:
- widevine-cdm-path: Path to widevine plugin
- widevine-cdm-version: Version of the widevine plugin

chromium_src/chrome/common/widevine_cdm_constants.cc

@@ -0,0 +1,16 @@
+// Copyright (c) 2013 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 "chrome/common/widevine_cdm_constants.h"
+
+#include "build/build_config.h"
+#include "ppapi/shared_impl/ppapi_permissions.h"
+
+const base::FilePath::CharType kWidevineCdmBaseDirectory[] =
+    FILE_PATH_LITERAL("WidevineCDM");
+
+const char kWidevineCdmPluginExtension[] = "";
+
+const int32 kWidevineCdmPluginPermissions = ppapi::PERMISSION_DEV |
+                                            ppapi::PERMISSION_PRIVATE;