Update from https://crrev.com/304121

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 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