Removed unneeded includes of base/scoped_ptr.h.

base/histogram.h

 // Copyright (c) 2006-2008 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.
 
 // Histogram is an object that aggregates statistics, and can summarize them in
 // various forms, including ASCII graphical, HTML, and numerically (as a
 // vector of numbers corresponding to each of the aggregating buckets).
 
 // It supports calls to accumulate either time intervals (which are processed
 // as integral number of milliseconds), or arbitrary integral units.
@@ skipping 19 matching lines @@
 
 #ifndef BASE_HISTOGRAM_H__
 #define BASE_HISTOGRAM_H__
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/lock.h"
 #include "base/pickle.h"
-#include "base/scoped_ptr.h"
 #include "base/stats_counters.h"
 
 //------------------------------------------------------------------------------
 // Provide easy general purpose histogram in a macro, just like stats counters.
 // The first two macros use 50 buckets.
 
 #define HISTOGRAM_TIMES(name, sample) do { \
     static Histogram counter((name), base::TimeDelta::FromMilliseconds(1), \
                              base::TimeDelta::FromSeconds(10), 50); \
     counter.AddTime(sample); \
@@ skipping 470 matching lines @@
   // lock protects access to the above map.
   static Lock* lock_;
 
   // Dump all known histograms to log.
   static bool dump_on_exit_;
 
   DISALLOW_COPY_AND_ASSIGN(StatisticsRecorder);
 };
 
 #endif  // BASE_HISTOGRAM_H__