Instrumenting QUIC code to find jank in GetConnectionDescriptionString

net/base/net_util_win.cc

Index: net/base/net_util_win.cc
diff --git a/net/base/net_util_win.cc b/net/base/net_util_win.cc
index 6658358e4e047927cb5c72ce1f8a8192a2de5171..5cd4a42daf85853e0021320772ae5b8df07192a9 100644
--- a/net/base/net_util_win.cc
+++ b/net/base/net_util_win.cc
@@ -12,6 +12,7 @@
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/profiler/scoped_tracker.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
@@ -200,6 +201,10 @@ bool GetNetworkList(NetworkInterfaceList* networks, int policy) {
 }
 
 WifiPHYLayerProtocol GetWifiPHYLayerProtocol() {
+  // TODO(rtenneti): Remove ScopedTracker below once crbug.com/422516 is fixed.
+  tracked_objects::ScopedTracker tracking_profile1(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422516 net_util_win::GetWifiPHYLayerProtocol1"));
   const internal::WlanApi& wlanapi = internal::WlanApi::GetInstance();
   if (!wlanapi.initialized)
     return WIFI_PHY_LAYER_PROTOCOL_NONE;
@@ -207,10 +212,18 @@ WifiPHYLayerProtocol GetWifiPHYLayerProtocol() {
   internal::WlanHandle client;
   DWORD cur_version = 0;
   const DWORD kMaxClientVersion = 2;
+  // TODO(rtenneti): Remove ScopedTracker below once crbug.com/422516 is fixed.
+  tracked_objects::ScopedTracker tracking_profile2(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422516 net_util_win::GetWifiPHYLayerProtocol2"));
   DWORD result = wlanapi.OpenHandle(kMaxClientVersion, &cur_version, &client);
   if (result != ERROR_SUCCESS)
     return WIFI_PHY_LAYER_PROTOCOL_NONE;
 
+  // TODO(rtenneti): Remove ScopedTracker below once crbug.com/422516 is fixed.
+  tracked_objects::ScopedTracker tracking_profile3(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422516 net_util_win::GetWifiPHYLayerProtocol3"));
   WLAN_INTERFACE_INFO_LIST* interface_list_ptr = NULL;
   result = wlanapi.enum_interfaces_func(client.Get(), NULL,
                                         &interface_list_ptr);
@@ -219,6 +232,10 @@ WifiPHYLayerProtocol GetWifiPHYLayerProtocol() {
   scoped_ptr<WLAN_INTERFACE_INFO_LIST, internal::WlanApiDeleter> interface_list(
       interface_list_ptr);
 
+  // TODO(rtenneti): Remove ScopedTracker below once crbug.com/422516 is fixed.
+  tracked_objects::ScopedTracker tracking_profile4(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422516 net_util_win::GetWifiPHYLayerProtocol4"));
   // Assume at most one connected wifi interface.
   WLAN_INTERFACE_INFO* info = NULL;
   for (unsigned i = 0; i < interface_list->dwNumberOfItems; ++i) {
@@ -235,6 +252,10 @@ WifiPHYLayerProtocol GetWifiPHYLayerProtocol() {
   WLAN_CONNECTION_ATTRIBUTES* conn_info_ptr;
   DWORD conn_info_size = 0;
   WLAN_OPCODE_VALUE_TYPE op_code;
+  // TODO(rtenneti): Remove ScopedTracker below once crbug.com/422516 is fixed.
+  tracked_objects::ScopedTracker tracking_profile5(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422516 net_util_win::GetWifiPHYLayerProtocol5"));
   result = wlanapi.query_interface_func(
       client.Get(), &info->InterfaceGuid, wlan_intf_opcode_current_connection,
       NULL, &conn_info_size, reinterpret_cast<VOID**>(&conn_info_ptr),