Change includes of histogram.h to histogram_macros.h.

content/browser/histogram_synchronizer.cc

 // 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.
 
 #include "content/browser/histogram_synchronizer.h"
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "base/logging.h"
-#include "base/metrics/histogram.h"
 #include "base/metrics/histogram_delta_serialization.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/pickle.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "content/browser/histogram_controller.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/histogram_fetcher.h"
 #include "content/public/common/content_constants.h"
 
 using base::Time;
@@ skipping 314 matching lines @@
         kHistogramSynchronizerReservedSequenceNumber + 1;
   }
   DCHECK_NE(last_used_sequence_number_,
             kHistogramSynchronizerReservedSequenceNumber);
   if (requester == ASYNC_HISTOGRAMS)
     async_sequence_number_ = last_used_sequence_number_;
   return last_used_sequence_number_;
 }
 
 }  // namespace content