Added and implemented HttpStream::GetTotalSentBytes for basic streams.

net/http/http_stream_factory_impl_unittest.cc

Index: net/http/http_stream_factory_impl_unittest.cc
diff --git a/net/http/http_stream_factory_impl_unittest.cc b/net/http/http_stream_factory_impl_unittest.cc
index a3a624a48e5eca3dce2dc5f44e7e79617ad1e6fb..cb8c79bd9a0fd2645dc20c7e138bec5ce6fbaed4 100644
--- a/net/http/http_stream_factory_impl_unittest.cc
+++ b/net/http/http_stream_factory_impl_unittest.cc
@@ -4,6 +4,8 @@
 
 #include "net/http/http_stream_factory_impl.h"
 
+#include <stdint.h>
+
 #include <string>
 #include <vector>
 
@@ -86,6 +88,7 @@ class MockWebSocketHandshakeStream : public WebSocketHandshakeStreamBase {
   void SetConnectionReused() override {}
   bool IsConnectionReusable() const override { return false; }
   int64 GetTotalReceivedBytes() const override { return 0; }
+  int64_t GetTotalSentBytes() const override { return 0; }
   bool GetLoadTimingInfo(LoadTimingInfo* load_timing_info) const override {
     return false;
   }