Declare the binary components support the group policy to enable/disable them.

chrome/browser/component_updater/widevine_cdm_component_installer.cc

 // 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/browser/component_updater/widevine_cdm_component_installer.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
 #include <memory>
@@ skipping 263 matching lines @@
                         std::unique_ptr<base::DictionaryValue> manifest);
 
   DISALLOW_COPY_AND_ASSIGN(WidevineCdmComponentInstallerTraits);
 };
 
 WidevineCdmComponentInstallerTraits::WidevineCdmComponentInstallerTraits() {
 }
 
 bool WidevineCdmComponentInstallerTraits::
     SupportsGroupPolicyEnabledComponentUpdates() const {
-  return false;
+  return true;
 }
 
 bool WidevineCdmComponentInstallerTraits::RequiresNetworkEncryption() const {
   return false;
 }
 
 bool WidevineCdmComponentInstallerTraits::OnCustomInstall(
     const base::DictionaryValue& manifest,
     const base::FilePath& install_dir) {
   return true;
@@ skipping 119 matching lines @@
   std::unique_ptr<ComponentInstallerTraits> traits(
       new WidevineCdmComponentInstallerTraits);
   // |cus| will take ownership of |installer| during installer->Register(cus).
   DefaultComponentInstaller* installer =
       new DefaultComponentInstaller(std::move(traits));
   installer->Register(cus, base::Closure());
 #endif  // defined(WIDEVINE_CDM_AVAILABLE) && defined(WIDEVINE_CDM_IS_COMPONENT)
 }
 
 }  // namespace component_updater