Add a new historgram Net.QuicSession.ConnectionClose.NumOpenStreams.HandshakeTimedOut

which tracks the number of streams open when a QUIC session crypto handshake timed out.

Review URL: https://codereview.chromium.org/323933003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@276056 0039d316-1c4b-4281-b951-d872f2087c98

net/quic/quic_client_session.cc

@@ -584,8 +584,9 @@ void QuicClientSession::OnConnectionClosed(QuicErrorCode error,
         "Net.QuicSession.ConnectionClose.NumOpenStreams.TimedOut",
         GetNumOpenStreams());
     if (!IsCryptoHandshakeConfirmed()) {
-      // If there have been any streams created, they were 0-RTT speculative
-      // requests that have not be serviced.
+      UMA_HISTOGRAM_COUNTS(
+          "Net.QuicSession.ConnectionClose.NumOpenStreams.HandshakeTimedOut",
+          GetNumOpenStreams());
       UMA_HISTOGRAM_COUNTS(
           "Net.QuicSession.ConnectionClose.NumTotalStreams.HandshakeTimedOut",
           num_total_streams_);

tools/metrics/histograms/histograms.xml

@@ -14214,6 +14214,14 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <summary>The reason a QUIC handshake failed.</summary>
 </histogram>
 
+<histogram
+    name="Net.QuicSession.ConnectionClose.NumOpenStreams.HandshakeTimedOut">
+  <owner>rch@chromium.org</owner>
+  <summary>
+    The number of streams open when a QUIC session crypto handshake timed out.
+  </summary>
+</histogram>
+
 <histogram name="Net.QuicSession.ConnectionClose.NumOpenStreams.TimedOut">
   <owner>rch@chromium.org</owner>
   <summary>The number of streams open when a QUIC session timed out.</summary>