components: Cleanup class/struct fwd declarations

components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.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_TEST_UTILS_H_
 #define COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_TEST_UTILS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 17 matching lines @@
 #include "components/data_reduction_proxy/core/browser/data_store.h"
 #include "net/base/backoff_entry.h"
 #include "net/log/test_net_log.h"
 #include "net/proxy/proxy_server.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 class GURL;
 class TestingPrefServiceSimple;
 
-namespace base {
-class MessageLoopForUI;
-}
-
 namespace net {
 class MockClientSocketFactory;
 class NetLog;
 class URLRequestContext;
 class URLRequestContextStorage;
 }
 
 namespace data_reduction_proxy {
 
 class ClientConfig;
 class DataReductionProxyConfigurator;
 class DataReductionProxyEventCreator;
 class DataReductionProxyMutableConfigValues;
 class DataReductionProxyRequestOptions;
 class DataReductionProxySettings;
-class DataReductionProxyCompressionStats;
 class MockDataReductionProxyConfig;
 class TestDataReductionProxyConfig;
 class TestDataReductionProxyEventStorageDelegate;
 class TestDataReductionProxyParams;
 
 // Test version of |DataReductionProxyRequestOptions|.
 class TestDataReductionProxyRequestOptions
     : public DataReductionProxyRequestOptions {
  public:
   TestDataReductionProxyRequestOptions(Client client,
@@ skipping 445 matching lines @@
   std::unique_ptr<TestConfigStorer> config_storer_;
 
   TestDataReductionProxyParams* params_;
 
   DISALLOW_COPY_AND_ASSIGN(DataReductionProxyTestContext);
 };
 
 }  // namespace data_reduction_proxy
 
 #endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_TEST_UTILS_H_