Add a new UMA histogram for tracking SpdySessionErrorDetails

net/spdy/spdy_session_pool.cc

Index: net/spdy/spdy_session_pool.cc
diff --git a/net/spdy/spdy_session_pool.cc b/net/spdy/spdy_session_pool.cc
index bcdbd0ea272c790390567ce6d4180bd7dc48e4a7..277858ef2df5fb507a88ff2dbdd8ec9e7a97456e 100644
--- a/net/spdy/spdy_session_pool.cc
+++ b/net/spdy/spdy_session_pool.cc
@@ -408,7 +408,7 @@ void SpdySessionPool::CloseAllSessions() {
     // This call takes care of removing the session from the pool, as well as
     // removing the session list if the list is empty.
     session->CloseSessionOnError(
-        net::ERR_ABORTED, true, "Closing all sessions.");
+        net::ERR_ABORTED, SPDY_NO_ERROR, true, "Closing all sessions.");
   }
 }
 
@@ -430,7 +430,7 @@ void SpdySessionPool::CloseCurrentSessions() {
     const scoped_refptr<SpdySession>& session = list->front();
     CHECK(session);
     session->CloseSessionOnError(
-        net::ERR_ABORTED, false, "Closing current sessions.");
+        net::ERR_ABORTED, SPDY_NO_ERROR, false, "Closing current sessions.");
     list->pop_front();
     if (list->empty()) {
       delete list;
@@ -455,7 +455,7 @@ void SpdySessionPool::CloseIdleSessions() {
     CHECK(session);
     if (!session->is_active()) {
       session->CloseSessionOnError(
-          net::ERR_ABORTED, true, "Closing idle sessions.");
+          net::ERR_ABORTED, SPDY_NO_ERROR, true, "Closing idle sessions.");
     }
   }
 }