Record the time duration for establishing proxy connection

net/http/http_proxy_client_socket_pool_unittest.cc

Index: net/http/http_proxy_client_socket_pool_unittest.cc
diff --git a/net/http/http_proxy_client_socket_pool_unittest.cc b/net/http/http_proxy_client_socket_pool_unittest.cc
index d782c70349318f007e8c05c786e98548ae598fd2..bbb74a9ee978a2f37dbc0684d4f444ae1b14f28e 100644
--- a/net/http/http_proxy_client_socket_pool_unittest.cc
+++ b/net/http/http_proxy_client_socket_pool_unittest.cc
@@ -10,6 +10,7 @@
 #include "base/compiler_specific.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/test/histogram_tester.h"
 #include "net/base/net_errors.h"
 #include "net/base/proxy_delegate.h"
 #include "net/base/test_completion_callback.h"
@@ -191,6 +192,8 @@ class HttpProxyClientSocketPoolTest
     return transport_socket_pool_.last_request_priority();
   }
 
+  const base::HistogramTester& histogram_tester() { return histogram_tester_; }
+
  private:
   SpdySessionDependencies session_deps_;
 
@@ -201,6 +204,8 @@ class HttpProxyClientSocketPoolTest
 
   std::unique_ptr<HttpNetworkSession> session_;
 
+  base::HistogramTester histogram_tester_;
+
  protected:
   SpdyTestUtil spdy_util_;
   std::unique_ptr<SSLSocketDataProvider> ssl_data_;
@@ -230,6 +235,12 @@ TEST_P(HttpProxyClientSocketPoolTest, NoTunnel) {
   EXPECT_FALSE(proxy_delegate->on_before_tunnel_request_called());
   EXPECT_FALSE(proxy_delegate->on_tunnel_headers_received_called());
   EXPECT_TRUE(proxy_delegate->on_tunnel_request_completed_called());
+
+  bool is_secure_proxy = GetParam() == HTTPS || GetParam() == SPDY;
+  histogram_tester().ExpectTotalCount(
+      "Net.Proxy.ConnectLatency.Insecure.Success", is_secure_proxy ? 0 : 1);
+  histogram_tester().ExpectTotalCount("Net.Proxy.ConnectLatency.Secure.Success",
+                                      is_secure_proxy ? 1 : 0);
 }
 
 // Make sure that HttpProxyConnectJob passes on its priority to its