Reduce header dependencies in net/

net/base/upload_data_stream.cc

Index: net/base/upload_data_stream.cc
diff --git a/net/base/upload_data_stream.cc b/net/base/upload_data_stream.cc
index 468ef6b198dae3f234feb214ccae337fb7dcacae..7a97846e296fc25188d34e705b5d1f244df9fc5b 100644
--- a/net/base/upload_data_stream.cc
+++ b/net/base/upload_data_stream.cc
@@ -5,6 +5,7 @@
 #include "net/base/upload_data_stream.h"
 
 #include "base/logging.h"
+#include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 
 namespace net {