Remove obviously unneeded forward declarations from headers under src/{app,base,net}.

net/http/http_stream_factory.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 NET_HTTP_HTTP_STREAM_FACTORY_H_
 #define NET_HTTP_HTTP_STREAM_FACTORY_H_
 
 #include <set>
 #include <string>
 
 
 #include "base/scoped_ptr.h"
 #include "net/base/completion_callback.h"
 #include "net/base/host_mapping_rules.h"
 #include "net/base/ssl_config_service.h"
 #include "net/http/http_auth.h"
 #include "net/http/http_auth_controller.h"
 #include "net/http/stream_factory.h"
 #include "net/proxy/proxy_service.h"
 #include "net/socket/client_socket_handle.h"
 
 
 namespace net {
 
-class ClientSocketHandle;
-class HttpAuthController;
 class HttpNetworkSession;
-class HttpStreamRequest;
 
 class HttpStreamFactory : public StreamFactory,
                           public base::RefCounted<HttpStreamFactory> {
  public:
   HttpStreamFactory();
   virtual ~HttpStreamFactory();
 
   // StreamFactory Interface
   virtual void RequestStream(const HttpRequestInfo* info,
                              SSLConfig* ssl_config,
@@ skipping 65 matching lines @@
   static bool force_spdy_always_;
   static bool ignore_certificate_errors_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpStreamFactory);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STREAM_FACTORY_H_