Delete some unused code found by -Wunused-function

chrome/browser/ui/webui/ntp/ntp_resource_cache.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/ntp_resource_cache.h"
 
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 155 matching lines @@
 // How the background image on the new tab page should be tiled (see tiling
 // masks in theme_service.h).
 std::string GetNewTabBackgroundTilingCSS(
     const ui::ThemeProvider* theme_provider) {
   int repeat_mode;
   theme_provider->GetDisplayProperty(
       ThemeService::NTP_BACKGROUND_TILING, &repeat_mode);
   return ThemeService::TilingToString(repeat_mode);
 }
 
-// Is the current time within a given date range?
-bool InDateRange(double begin, double end) {
-  Time start_time = Time::FromDoubleT(begin);
-  Time end_time = Time::FromDoubleT(end);
-  return start_time < Time::Now() && end_time > Time::Now();
-}
-
 }  // namespace
 
 NTPResourceCache::NTPResourceCache(Profile* profile)
     : profile_(profile), is_swipe_tracking_from_scroll_events_enabled_(false) {
   registrar_.Add(this, chrome::NOTIFICATION_BROWSER_THEME_CHANGED,
                  content::Source<ThemeService>(
                      ThemeServiceFactory::GetForProfile(profile)));
   registrar_.Add(this, chrome::NOTIFICATION_PROMO_RESOURCE_STATE_CHANGED,
                  content::NotificationService::AllSources());
 
@@ skipping 386 matching lines @@
       ResourceBundle::GetSharedInstance().GetRawDataResource(
           chrome::search::IsInstantExtendedAPIEnabled(profile_) ?
               IDR_NEW_TAB_SEARCH_THEME_CSS : IDR_NEW_TAB_4_THEME_CSS,
           ui::SCALE_FACTOR_NONE));
 
   // Create the string from our template and the replacements.
   std::string css_string;
   css_string = ReplaceStringPlaceholders(new_tab_theme_css, subst, NULL);
   new_tab_css_ = base::RefCountedString::TakeString(&css_string);
 }