Change includes of histogram.h to histogram_macros.h.

components/history/core/browser/download_database.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 "components/history/core/browser/download_database.h"
 
 #include <inttypes.h>
 
 #include <limits>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/debug/alias.h"
 #include "base/files/file_path.h"
-#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/rand_util.h"
 #include "base/stl_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "components/history/core/browser/download_constants.h"
 #include "components/history/core/browser/download_row.h"
 #include "components/history/core/browser/history_types.h"
 #include "sql/statement.h"
@@ skipping 654 matching lines @@
 size_t DownloadDatabase::CountDownloads() {
   EnsureInProgressEntriesCleanedUp();
 
   sql::Statement statement(GetDB().GetCachedStatement(SQL_FROM_HERE,
       "SELECT count(*) from downloads"));
   statement.Step();
   return statement.ColumnInt(0);
 }
 
 }  // namespace history