Instrumenting QUIC code to find jank in GetConnectionDescriptionString

and GetWifiPHYLayerProtocol

BUG=422516
R=rch@chromium.org, vadimt@chromium.org

Review URL: https://codereview.chromium.org/940133002

Cr-Commit-Position: refs/heads/master@{#317163}

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),

net/quic/quic_connection_logger.cc

@@ -284,6 +284,12 @@ const char* GetConnectionDescriptionString() {
   // This function only seems usefully defined on Windows currently.
   if (type == NetworkChangeNotifier::CONNECTION_UNKNOWN ||
       type == NetworkChangeNotifier::CONNECTION_WIFI) {
+    // TODO(rtenneti): Remove ScopedTracker below once crbug.com/422516 is
+    // fixed.
+    tracked_objects::ScopedTracker tracking_profile1(
+        FROM_HERE_WITH_EXPLICIT_FUNCTION(
+            "422516 QuicConnectionLogger GetConnectionDescriptionString1"));
+
     WifiPHYLayerProtocol wifi_type = GetWifiPHYLayerProtocol();
     switch (wifi_type) {
       case WIFI_PHY_LAYER_PROTOCOL_NONE: