Update from https://crrev.com/305340

base/profiler/scoped_tracker.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/profiler/scoped_tracker.h"
 
 #include "base/bind.h"
 
 namespace tracked_objects {
 
 namespace {
 
 ScopedProfile::Mode g_scoped_profile_mode = ScopedProfile::DISABLED;
 
-// Executes |callback|, augmenting it with provided |location|.
-void ExecuteAndTrackCallback(const Location& location,
-                             const base::Closure& callback) {
-  ScopedProfile tracking_profile(location, ScopedProfile::ENABLED);
-  callback.Run();
-}
-
 }  // namespace
 
 // static
 void ScopedTracker::Enable() {
   g_scoped_profile_mode = ScopedProfile::ENABLED;
 }
 
-// static
-base::Closure ScopedTracker::TrackCallback(const Location& location,
-                                           const base::Closure& callback) {
-  if (g_scoped_profile_mode != ScopedProfile::ENABLED)
-    return callback;
-
-  return base::Bind(ExecuteAndTrackCallback, location, callback);
-}
-
 ScopedTracker::ScopedTracker(const Location& location)
     : scoped_profile_(location, g_scoped_profile_mode) {
 }
 
 }  // namespace tracked_objects