Fix a bunch of IWYU violators that don't include scoped_ptr.h

components/metrics/profiler/tracking_synchronizer.h

 // Copyright (c) 2012 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.
 
 #ifndef COMPONENTS_METRICS_PROFILER_TRACKING_SYNCHRONIZER_H_
 #define COMPONENTS_METRICS_PROFILER_TRACKING_SYNCHRONIZER_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/tick_clock.h"
 #include "base/time/time.h"
 #include "base/tracked_objects.h"
 #include "components/metrics/profiler/tracking_synchronizer_delegate.h"
 #include "components/metrics/proto/chrome_user_metrics_extension.pb.h"
 
 // This class maintains state that is used to upload profiler data from the
 // various processes, into the browser process. Such transactions are usually
@@ skipping 131 matching lines @@
   // NOTE: Leave this ivar last so that the delegate is torn down first at
   // destruction, as it has a reference to this object.
   scoped_ptr<TrackingSynchronizerDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(TrackingSynchronizer);
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_PROFILER_TRACKING_SYNCHRONIZER_H_