Remove NTP4 intro bubble

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 <vector>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
@@ skipping 168 matching lines @@
 
 }  // 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());
-  registrar_.Add(this, chrome::NTP4_INTRO_PREF_CHANGED,
-                 content::NotificationService::AllSources());
 
   // Watch for pref changes that cause us to need to invalidate the HTML cache.
   pref_change_registrar_.Init(profile_->GetPrefs());
   pref_change_registrar_.Add(prefs::kSyncAcknowledgedSyncTypes, this);
   pref_change_registrar_.Add(prefs::kShowBookmarkBar, this);
   pref_change_registrar_.Add(prefs::kNtpShownPage, this);
   pref_change_registrar_.Add(prefs::kSyncPromoShowNTPBubble, this);
 }
 
 NTPResourceCache::~NTPResourceCache() {}
@@ skipping 42 matching lines @@
 void NTPResourceCache::Observe(int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   // Invalidate the cache.
   if (chrome::NOTIFICATION_BROWSER_THEME_CHANGED == type ||
       chrome::NOTIFICATION_PROMO_RESOURCE_STATE_CHANGED == type) {
     new_tab_incognito_html_ = NULL;
     new_tab_html_ = NULL;
     new_tab_incognito_css_ = NULL;
     new_tab_css_ = NULL;
-  } else if (chrome::NOTIFICATION_PREF_CHANGED == type ||
-             chrome::NTP4_INTRO_PREF_CHANGED == type) {
+  } else if (chrome::NOTIFICATION_PREF_CHANGED == type) {
     // A change occurred to one of the preferences we care about, so flush the
     // cache.
     new_tab_incognito_html_ = NULL;
     new_tab_html_ = NULL;
   } else {
     NOTREACHED();
   }
 }
 
 void NTPResourceCache::CreateNewTabIncognitoHTML() {
@@ skipping 290 matching lines @@
   // Get our template.
   static const base::StringPiece new_tab_theme_css(
       ResourceBundle::GetSharedInstance().GetRawDataResource(
           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);
 }