Migrate chrome/browser files to histogram_macros.h includes.

chrome/browser/sessions/session_restore_stats_collector.cc

 // Copyright 2015 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/sessions/session_restore_stats_collector.h"
 
 #include <string>
 #include <utility>
 
-#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/strings/stringprintf.h"
 #include "base/time/default_tick_clock.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 
 namespace {
 
@@ skipping 509 matching lines @@
 
   EmitUmaSessionRestoreTabActionEvent(
       SESSION_RESTORE_TAB_ACTIONS_UMA_TAB_LOADING_DEFERRED);
 }
 
 void SessionRestoreStatsCollector::UmaStatsReportingDelegate::
     ReportDeferredTabLoaded() {
   EmitUmaSessionRestoreTabActionEvent(
       SESSION_RESTORE_TAB_ACTIONS_UMA_DEFERRED_TAB_LOADED);
 }