Add a new NetworkActivityMonitor to track network activity

net/udp/udp_socket_win.cc

Index: net/udp/udp_socket_win.cc
diff --git a/net/udp/udp_socket_win.cc b/net/udp/udp_socket_win.cc
index 4c307fd3b2804f4cec8fcf370aafc875050150a3..207edd2cbfeac68477261afeb9c1feac1a70c9ec 100644
--- a/net/udp/udp_socket_win.cc
+++ b/net/udp/udp_socket_win.cc
@@ -20,6 +20,7 @@
 #include "net/base/net_errors.h"
 #include "net/base/net_log.h"
 #include "net/base/net_util.h"
+#include "net/base/network_activity_monitor.h"
 #include "net/base/winsock_init.h"
 #include "net/base/winsock_util.h"
 #include "net/socket/socket_descriptor.h"
@@ -595,6 +596,7 @@ void UDPSocketWin::LogRead(int result, const char* bytes) const {
 
   base::StatsCounter read_bytes("udp.read_bytes");
   read_bytes.Add(result);
+  NetworkActivityMonitor::GetInstance()->IncrementBytesReceived(result);
 }
 
 void UDPSocketWin::DidCompleteWrite() {
@@ -626,6 +628,7 @@ void UDPSocketWin::LogWrite(int result,
 
   base::StatsCounter write_bytes("udp.write_bytes");
   write_bytes.Add(result);
+  NetworkActivityMonitor::GetInstance()->IncrementBytesWritten(result);
 }
 
 int UDPSocketWin::InternalRecvFrom(IOBuffer* buf, int buf_len,