components: Cleanup class/struct fwd declarations

components/data_reduction_proxy/core/browser/data_reduction_proxy_config_service_client.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_BROWSER_DATA_REDUCTION_PROXY_CONFIG_SERVICE_CLIENT_H_
 #define COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_CONFIG_SERVICE_CLIENT_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 28 matching lines @@
 
 namespace data_reduction_proxy {
 
 class ClientConfig;
 class DataReductionProxyConfig;
 class DataReductionProxyEventCreator;
 class DataReductionProxyIOData;
 class DataReductionProxyMutableConfigValues;
 class DataReductionProxyParams;
 class DataReductionProxyRequestOptions;
-class DataReductionProxyService;
 
 typedef base::Callback<void(const std::string&)> ConfigStorer;
 
 // Retrieves the default net::BackoffEntry::Policy for the Data Reduction Proxy
 // configuration service client.
 const net::BackoffEntry::Policy& GetBackoffPolicy();
 
 // Retrieves the Data Reduction Proxy configuration from a remote service. This
 // object lives on the IO thread.
 // TODO(jeremyim): Rename the class to DataReductionProxyConfigGetter(?).
@@ skipping 218 matching lines @@
   base::TimeTicks last_ip_address_change_;
 
   // Enforce usage on the IO thread.
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(DataReductionProxyConfigServiceClient);
 };
 
 }  // namespace data_reduction_proxy
 #endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_CONFIG_SERVICE_CLIENT_H_