run iwyu on base!

base/metrics/stats_counters.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.
 
+#include <stddef.h>
+#include <string>
+
 #include "base/metrics/stats_counters.h"
+#include "base/metrics/stats_table.h"
+#include "base/time.h"
 
 namespace base {
 
 StatsCounter::StatsCounter(const std::string& name)
     : counter_id_(-1) {
   // We prepend the name with 'c:' to indicate that it is a counter.
   name_ = "c:";
   name_.append(name);
 }
 
@@ skipping 92 matching lines @@
 }
 
 void StatsRate::Add(int value) {
   counter_.Increment();
   StatsCounterTimer::Add(value);
   if (value > largest_add_.value())
     largest_add_.Set(value);
 }
 
 }  // namespace base