Delete obviously unneeded forward declarations in chrome/browser/*.h.

chrome/browser/configuration_policy_provider.h

 // Copyright (c) 2010 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_CONFIGURATION_POLICY_PROVIDER_H_
 #define CHROME_BROWSER_CONFIGURATION_POLICY_PROVIDER_H_
 #pragma once
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "chrome/browser/configuration_policy_store.h"
 
-class DictionaryValue;
-
 // A mostly-abstract super class for platform-specific policy providers.
 // Platform-specific policy providers (Windows Group Policy, gconf,
 // etc.) should implement a subclass of this class.
 class ConfigurationPolicyProvider {
  public:
   ConfigurationPolicyProvider() {}
   virtual ~ConfigurationPolicyProvider() {}
 
   // Must be implemented by provider subclasses to specify the
   // provider-specific policy decisions. The preference service
@@ skipping 21 matching lines @@
   // Returns the mapping from policy values to the actual names used by
   // implementations.
   static const PolicyValueMap* PolicyValueMapping();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ConfigurationPolicyProvider);
 };
 
 #endif  // CHROME_BROWSER_CONFIGURATION_POLICY_PROVIDER_H_