QUIC - Collect histogram data to see how may users have TSVIPCli.dll

net/quic/quic_stream_factory.cc

Index: net/quic/quic_stream_factory.cc
diff --git a/net/quic/quic_stream_factory.cc b/net/quic/quic_stream_factory.cc
index 1620ae2259f964fc378255912c0abe45db20eb17..0e40756d6438569e1ed2f4f6e77764107c758bd3 100644
--- a/net/quic/quic_stream_factory.cc
+++ b/net/quic/quic_stream_factory.cc
@@ -1476,6 +1476,13 @@ int QuicStreamFactory::ConfigureSocket(DatagramClientSocket* socket,
 #endif
   }
 
+#if defined(OS_WIN)
+  // TODO(rtenneti): Delete the check for TSVIPCli.dll loaded and the histogram.
+  bool tsvipcli_loaded = ::GetModuleHandle(L"TSVIPCli.dll") != NULL;

[ramant (doing other things), 2016/05/15 21:20:36]

DLL could be loaded after chrome has been working and QUIC is being used. Thus
we (Ananta and I) thought it is safer to check every time a socket is
created/connected (crashes were happening in CryptoConnect in M50).

+  UMA_HISTOGRAM_BOOLEAN("Net.QuicStreamFactory.TSVIPCliIsLoaded",
+                        tsvipcli_loaded);
+#endif
+
   int rv;
   if (migrate_sessions_on_network_change_) {
     // If caller leaves network unspecified, use current default network.