policy: Remove ProfilePolicyConnector's dependency on other service factories.

chrome/browser/policy/profile_policy_connector_factory.h

 // 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.
 
 #ifndef CHROME_BROWSER_POLICY_PROFILE_POLICY_CONNECTOR_FACTORY_H_
 #define CHROME_BROWSER_POLICY_PROFILE_POLICY_CONNECTOR_FACTORY_H_
 
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/memory/singleton.h"
 #include "components/browser_context_keyed_service/browser_context_keyed_base_factory.h"
 
+template <typename T>
+struct DefaultSingletonTraits;
+
 class Profile;
 
 namespace base {
 class SequencedTaskRunner;
 }
 
 namespace content {
 class BrowserContext;
 }
 
@@ skipping 54 matching lines @@
 
   typedef std::map<Profile*, ProfilePolicyConnector*> ConnectorMap;
   ConnectorMap connectors_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfilePolicyConnectorFactory);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_PROFILE_POLICY_CONNECTOR_FACTORY_H_