Change QUIC ConnectionCloseError histograms to break out errors for Google...

Change QUIC ConnectionCloseError histograms to break out errors for Google hosts in an attempt to diagnose some unexpected errors.

Change-Id: I56a795474abda715025b7fbf015d4880537c8748
Reviewed-on: https://chromium-review.googlesource.com/c/1303045Reviewed-by: Nick Harper <nharper@chromium.org>
Reviewed-by: Jesse Doherty <jwd@chromium.org>
Commit-Queue: Ryan Hamilton <rch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604118}

net/quic/quic_chromium_client_session.cc

@@ -21,6 +21,7 @@
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/base/network_activity_monitor.h"
+#include "net/base/url_util.h"
 #include "net/http/transport_security_state.h"
 #include "net/log/net_log_event_type.h"
 #include "net/log/net_log_source_type.h"
@@ -1472,8 +1473,15 @@ void QuicChromiumClientSession::OnConnectionClosed(
     quic::ConnectionCloseSource source) {
   DCHECK(!connection()->connected());
   logger_->OnConnectionClosed(error, error_details, source);
+  bool is_google_host = HasGoogleHost(GURL("https://" + session_key_.host()));
   if (source == quic::ConnectionCloseSource::FROM_PEER) {
     if (IsCryptoHandshakeConfirmed()) {
+      if (is_google_host) {
+        base::UmaHistogramSparse(
+            "Net.QuicSession.ConnectionCloseErrorCodeServerGoogle."
+            "HandshakeConfirmed",
+            error);
+      }
       base::UmaHistogramSparse(
           "Net.QuicSession.ConnectionCloseErrorCodeServer.HandshakeConfirmed",
           error);
@@ -1484,10 +1492,20 @@ void QuicChromiumClientSession::OnConnectionClosed(
       if (num_streams > 0)
         histogram->AddCount(error, num_streams);
     }
+    if (is_google_host) {
+      base::UmaHistogramSparse(
+          "Net.QuicSession.ConnectionCloseErrorCodeServerGoogle", error);
+    }
     base::UmaHistogramSparse("Net.QuicSession.ConnectionCloseErrorCodeServer",
                              error);
   } else {
     if (IsCryptoHandshakeConfirmed()) {
+      if (is_google_host) {
+        base::UmaHistogramSparse(
+            "Net.QuicSession.ConnectionCloseErrorCodeClientGoogle."
+            "HandshakeConfirmed",
+            error);
+      }
       base::UmaHistogramSparse(
           "Net.QuicSession.ConnectionCloseErrorCodeClient.HandshakeConfirmed",
           error);
@@ -1504,6 +1522,10 @@ void QuicChromiumClientSession::OnConnectionClosed(
             connection()->IsPathDegrading());
       }
     }
+    if (is_google_host) {
+      base::UmaHistogramSparse(
+          "Net.QuicSession.ConnectionCloseErrorCodeClientGoogle", error);
+    }
     base::UmaHistogramSparse("Net.QuicSession.ConnectionCloseErrorCodeClient",
                              error);
   }

tools/metrics/histograms/histograms.xml

@@ -58175,6 +58175,15 @@ uploading your change for review.
   </summary>
 </histogram>
 
+<histogram name="Net.QuicSession.ConnectionCloseErrorCodeClientGoogle"
+    enum="QuicErrorCodes">
+  <owner>rch@chromium.org</owner>
+  <summary>
+    The QUIC error code which resulted in the connection being closed by the
+    client to a server ending in .google.com.
+  </summary>
+</histogram>
+
 <histogram name="Net.QuicSession.ConnectionCloseErrorCodeServer"
     enum="QuicErrorCodes">
   <owner>rch@chromium.org</owner>
@@ -58184,6 +58193,15 @@ uploading your change for review.
   </summary>
 </histogram>
 
+<histogram name="Net.QuicSession.ConnectionCloseErrorCodeServerGoogle"
+    enum="QuicErrorCodes">
+  <owner>rch@chromium.org</owner>
+  <summary>
+    The QUIC error code which resulted in the connection being closed by the
+    server with a name ending in .google.com.
+  </summary>
+</histogram>
+
 <histogram name="Net.QuicSession.ConnectionFlowControlBlocked"
     enum="BooleanBlocked">
   <owner>rch@chromium.org</owner>