run iwyu on base!

base/metrics/histogram.cc

 // Copyright (c) 2010 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).
 // See header file for details and examples.
 
+#include <architecture/i386/math.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <algorithm>
+#include <map>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
 #include "base/metrics/histogram.h"
-
-#include <math.h>
-
-#include <algorithm>
-#include <string>
-
-#include "base/logging.h"
 #include "base/pickle.h"
+#include "base/ref_counted.h"
 #include "base/stringprintf.h"
 #include "base/synchronization/lock.h"
+#include "base/time.h"
 
 namespace base {
 
 typedef Histogram::Count Count;
 
 scoped_refptr<Histogram> Histogram::FactoryGet(const std::string& name,
     Sample minimum, Sample maximum, size_t bucket_count, Flags flags) {
   scoped_refptr<Histogram> histogram(NULL);
 
   // Defensive code.
@@ skipping 1012 matching lines @@
 }
 
 // static
 StatisticsRecorder::HistogramMap* StatisticsRecorder::histograms_ = NULL;
 // static
 base::Lock* StatisticsRecorder::lock_ = NULL;
 // static
 bool StatisticsRecorder::dump_on_exit_ = false;
 
 }  // namespace base