Adding instrumentation to locate the source of jankiness.

components/google/core/browser/google_url_tracker.cc

Index: components/google/core/browser/google_url_tracker.cc
diff --git a/components/google/core/browser/google_url_tracker.cc b/components/google/core/browser/google_url_tracker.cc
index be9296be696573021940438f0a60660892930e6e..cd616b604593e861c55a34286dc10ec90342405d 100644
--- a/components/google/core/browser/google_url_tracker.cc
+++ b/components/google/core/browser/google_url_tracker.cc
@@ -7,6 +7,7 @@
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
+#include "base/profiler/scoped_profile.h"
 #include "base/strings/string_util.h"
 #include "components/google/core/browser/google_pref_names.h"
 #include "components/google/core/browser/google_switches.h"
@@ -106,6 +107,11 @@ void GoogleURLTracker::CancelGoogleURL() {
 }
 
 void GoogleURLTracker::OnURLFetchComplete(const net::URLFetcher* source) {
+  // TODO(vadimt): Remove ScopedProfile below once crbug.com/422577 is fixed.
+  tracked_objects::ScopedProfile tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "422577 GoogleURLTracker::OnURLFetchComplete"));
+
   // Delete the fetcher on this function's exit.
   scoped_ptr<net::URLFetcher> clean_up_fetcher(fetcher_.release());