Add LOCAL_ prefix to non-UMA histogram macros.

chrome/browser/ui/webui/ntp/new_tab_page_handler.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 "chrome/browser/ui/webui/ntp/new_tab_page_handler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
@@ skipping 17 matching lines @@
   PROMO_LINK_CLICKED,
   PROMO_ACTION_MAX,
 };
 
 }  // namespace
 
 NewTabPageHandler::NewTabPageHandler() : page_switch_count_(0) {
 }
 
 NewTabPageHandler::~NewTabPageHandler() {
-  HISTOGRAM_COUNTS_100("NewTabPage.SingleSessionPageSwitches",
-                       page_switch_count_);
+  LOCAL_HISTOGRAM_COUNTS_100("NewTabPage.SingleSessionPageSwitches",
+                             page_switch_count_);
 }
 
 void NewTabPageHandler::RegisterMessages() {
   // Record an open of the NTP with its default page type.
   PrefService* prefs = Profile::FromWebUI(web_ui())->GetPrefs();
   int shown_page_type = prefs->GetInteger(prefs::kNtpShownPage) >>
       kPageIdOffset;
   UMA_HISTOGRAM_ENUMERATION(kDefaultPageTypeHistogram,
                             shown_page_type, kHistogramEnumerationMax);
 
@@ skipping 141 matching lines @@
   values->SetInteger("shown_page_index", shown_page & INDEX_MASK);
 }
 
 void NewTabPageHandler::Notify(chrome::NotificationType notification_type) {
   content::NotificationService* service =
       content::NotificationService::current();
   service->Notify(notification_type,
                   content::Source<NewTabPageHandler>(this),
                   content::NotificationService::NoDetails());
 }