Reduce header dependencies in net/

net/base/ssl_client_socket_mac.cc

 // Copyright (c) 2008 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.
 
 #include "net/base/ssl_client_socket_mac.h"
 
 #include "base/singleton.h"
 #include "base/string_util.h"
+#include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/base/ssl_info.h"
 
 // Welcome to Mac SSL. We've been waiting for you.
 //
 // The Mac SSL implementation is, like the Windows and NSS implementations, a
 // giant state machine. This design constraint is due to the asynchronous nature
 // of our underlying transport mechanism. We can call down to read/write on the
 // network, but what happens is that either it completes immediately or returns
 // saying that we'll get a callback sometime in the future. In that case, we
@@ skipping 729 matching lines @@
 
   if (rv < 0 && rv != ERR_IO_PENDING) {
     return OSStatusFromNetError(rv);
   }
 
   // always lie to our caller
   return noErr;
 }
 
 }  // namespace net