Cleanup the ConfigurationPolicyHandler interface.

chrome/browser/download/download_dir_policy_handler.cc

 // Copyright 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/download/download_dir_policy_handler.h"
 
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_value_map.h"
 #include "base/values.h"
@@ skipping 96 matching lines @@
     prefs->SetValue(prefs::kPromptForDownload,
                     new base::FundamentalValue(false));
 #if defined(OS_CHROMEOS)
     if (download_to_drive) {
       prefs->SetValue(prefs::kDisableDrive,
                       new base::FundamentalValue(false));
     }
 #endif
   }
 }
+
+void DownloadDirPolicyHandler::ApplyPolicySettings(
+    const policy::PolicyMap& /* policies */,
+    PrefValueMap* /* prefs */) {
+  NOTREACHED();
+}