Added and implemented HttpStream::GetTotalSentBytes for basic streams.

net/socket/socket_test_util.h

Index: net/socket/socket_test_util.h
diff --git a/net/socket/socket_test_util.h b/net/socket/socket_test_util.h
index bd9725c3889ed971220ccbe7a087b172b9726984..523e9acd7cc0f31fd933d5e8f2a7970ecbf0076d 100644
--- a/net/socket/socket_test_util.h
+++ b/net/socket/socket_test_util.h
@@ -5,6 +5,8 @@
 #ifndef NET_SOCKET_SOCKET_TEST_UTIL_H_
 #define NET_SOCKET_SOCKET_TEST_UTIL_H_
 
+#include <stdint.h>
+
 #include <cstring>
 #include <deque>
 #include <string>
@@ -1237,6 +1239,12 @@ extern const int kSOCKS5OkRequestLength;
 extern const char kSOCKS5OkResponse[];
 extern const int kSOCKS5OkResponseLength;
 
+// Helper function to get the total data size of the MockReads in |reads|.
+int64_t CountReadBytes(const MockRead reads[], size_t reads_size);
+
+// Helper function to get the total data size of the MockWrites in |writes|.
+int64_t CountWriteBytes(const MockWrite writes[], size_t writes_size);
+
 }  // namespace net
 
 #endif  // NET_SOCKET_SOCKET_TEST_UTIL_H_