chrome: Cleanup class/struct forward declarations

chrome/browser/extensions/api/dial/dial_service.h

 // Copyright (c) 2012 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_EXTENSIONS_API_DIAL_DIAL_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_API_DIAL_DIAL_SERVICE_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/timer/timer.h"
 #include "net/base/ip_address.h"
 #include "net/log/net_log_source.h"
 #include "net/socket/udp_socket.h"
 
 namespace net {
-class IOBuffer;
 class IPEndPoint;
 class StringIOBuffer;
 class NetLog;
-struct NetworkInterface;
 }
 
 namespace extensions {
 
 class DialDeviceData;
 
 // DialService accepts requests to discover devices, sends multiple M-SEARCH
 // requests via UDP multicast, and notifies observers when a DIAL-compliant
 // device responds.
 //
@@ skipping 251 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(DialServiceTest, TestOnDeviceDiscovered);
   FRIEND_TEST_ALL_PREFIXES(DialServiceTest, TestOnDiscoveryFinished);
   FRIEND_TEST_ALL_PREFIXES(DialServiceTest, TestOnDiscoveryRequest);
   FRIEND_TEST_ALL_PREFIXES(DialServiceTest, TestResponseParsing);
   DISALLOW_COPY_AND_ASSIGN(DialServiceImpl);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DIAL_DIAL_SERVICE_H_