Migrate chrome/browser files to histogram_macros.h includes.

chrome/browser/download/download_stats.cc

 // Copyright 2013 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 "chrome/browser/download/download_stats.h"
 
-#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_macros.h"
 
 void RecordDownloadShelfClose(int size, int in_progress, bool autoclose) {
   static const int kMaxShelfSize = 16;
   if (autoclose) {
     UMA_HISTOGRAM_ENUMERATION(
         "Download.ShelfSizeOnAutoClose", size, kMaxShelfSize);
     UMA_HISTOGRAM_ENUMERATION(
         "Download.ShelfInProgressSizeOnAutoClose", in_progress, kMaxShelfSize);
   } else {
     UMA_HISTOGRAM_ENUMERATION(
@@ skipping 25 matching lines @@
   UMA_HISTOGRAM_ENUMERATION("Download.ShowDangerousDownloadConfirmationPrompt",
                             danger_type,
                             content::DOWNLOAD_DANGER_TYPE_MAX);
 }
 
 void RecordDownloadOpenMethod(ChromeDownloadOpenMethod open_method) {
   UMA_HISTOGRAM_ENUMERATION("Download.OpenMethod",
                             open_method,
                             DOWNLOAD_OPEN_METHOD_LAST_ENTRY);
 }