Coverity: Initialize member variables.

chrome/browser/policy/cloud_policy_subsystem.cc

 // Copyright (c) 2011 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/policy/cloud_policy_subsystem.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 187 matching lines @@
                                 device_token_fetcher_.get(),
                                 data_store_,
                                 notifier_.get()));
 }
 
 CloudPolicyCacheBase* CloudPolicySubsystem::GetCloudPolicyCacheBase() const {
   return cloud_policy_cache_.get();
 }
 
 CloudPolicySubsystem::CloudPolicySubsystem()
-    : refresh_pref_name_(NULL) {}
+    : refresh_pref_name_(NULL),
+      data_store_(NULL) {
+}
 
 }  // namespace policy