Add a histogram for measuring SSL Connect times.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/194035

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@25956 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 14 insertions, 2 deletions

diff --git a/net/http/http_network_transaction.cc b/net/http/http_network_transaction.cc
index 7f1495d..1c39524 100644
--- a/net/http/http_network_transaction.cc
+++ b/net/http/http_network_transaction.cc
@@ -710,6 +710,8 @@ int HttpNetworkTransaction::DoSSLConnect() {
   if (request_->load_flags & LOAD_VERIFY_EV_CERT)
     ssl_config_.verify_ev_cert = true;
 
+  ssl_connect_start_time_ = base::TimeTicks::Now();
+
   // Add a SSL socket on top of our existing transport socket.
   ClientSocket* s = connection_.release_socket();
   s = socket_factory_->CreateSSLClientSocket(
@@ -723,6 +725,16 @@ int HttpNetworkTransaction::DoSSLConnectComplete(int result) {
     result = HandleCertificateError(result);
 
   if (result == OK) {
+    DCHECK(ssl_connect_start_time_ != base::TimeTicks());
+    base::TimeDelta connect_duration =
+        base::TimeTicks::Now() - ssl_connect_start_time_;
+
+    UMA_HISTOGRAM_CLIPPED_TIMES("Net.SSL_Connection_Latency",
+        connect_duration,
+        base::TimeDelta::FromMilliseconds(1),
+        base::TimeDelta::FromMinutes(10),
+        100);
+
     next_state_ = STATE_WRITE_HEADERS;
   } else if (result == ERR_SSL_CLIENT_AUTH_CERT_NEEDED) {
     result = HandleCertificateRequest(result);
diff --git a/net/http/http_network_transaction.h b/net/http/http_network_transaction.h
index 3ffad74..7a0d635 100644
--- a/net/http/http_network_transaction.h
+++ b/net/http/http_network_transaction.h
@@ -408,8 +408,8 @@ class HttpNetworkTransaction : public HttpTransaction {
   // The time the Start method was called.
   base::Time start_time_;
 
-  // The time the Connect() method was called (if it got called).
-  base::Time connect_start_time_;
+  // The time the DoSSLConnect() method was called (if it got called).
+  base::TimeTicks ssl_connect_start_time_;
 
   // The next state in the state machine.
   State next_state_;