components: Cleanup class/struct fwd declarations

components/data_reduction_proxy/core/common/data_reduction_proxy_config_values.h

 // Copyright 2015 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 COMPONENTS_DATA_REDUCTION_PROXY_CORE_COMMON_DATA_REDUCTION_PROXY_CONFIG_VALUES_H_
 #define COMPONENTS_DATA_REDUCTION_PROXY_CORE_COMMON_DATA_REDUCTION_PROXY_CONFIG_VALUES_H_
 
 #include <vector>
 
 class GURL;
 
 namespace net {
 class ProxyServer;
 }
 
 namespace data_reduction_proxy {
 
-struct DataReductionProxyTypeInfo;
-
 class DataReductionProxyConfigValues {
  public:
   virtual ~DataReductionProxyConfigValues() {}
 
   // Returns true if the data reduction proxy promo may be shown.
   // This is independent of whether the data reduction proxy is allowed.
   // TODO(bengr): maybe tie to whether proxy is allowed.
   virtual bool promo_allowed() const = 0;
 
   // Returns true if the data reduction proxy should not actually use the
@@ skipping 10 matching lines @@
   virtual const std::vector<net::ProxyServer>& proxies_for_http() const = 0;
 
   // Returns the URL to check to decide if the secure proxy origin should be
   // used.
   virtual const GURL& secure_proxy_check_url() const = 0;
 };
 
 }  // namespace data_reduction_proxy
 
 #endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_COMMON_DATA_REDUCTION_PROXY_CONFIG_VALUES_H_