Mac: Prevent NTP mousewheel events from being suppressed on Lion.

chrome/browser/ui/webui/ntp/ntp_resource_cache.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_NTP_NTP_RESOURCE_CACHE_H_
 #define CHROME_BROWSER_UI_WEBUI_NTP_NTP_RESOURCE_CACHE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 22 matching lines @@
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
  private:
   Profile* profile_;
 
   void CreateNewTabHTML();
   scoped_refptr<RefCountedMemory> new_tab_html_;
 
+  // Helper to determine if the resource cache should be invalidated.
+  // This is called on every page load, and can be used to check values that
+  // don't generate a notification when changed (e.g., system preferences).
+  bool NewTabCacheNeedsRefresh();
+
 #if !defined(OS_ANDROID)
   // Returns a message describing any newly-added sync types, or an empty
   // string if all types have already been acknowledged.
   string16 GetSyncTypeMessage();
 
   void CreateNewTabIncognitoHTML();
   scoped_refptr<RefCountedMemory> new_tab_incognito_html_;
 
   void CreateNewTabIncognitoCSS();
   scoped_refptr<RefCountedMemory> new_tab_incognito_css_;
   void CreateNewTabCSS();
   scoped_refptr<RefCountedMemory> new_tab_css_;
 
   content::NotificationRegistrar registrar_;
   PrefChangeRegistrar pref_change_registrar_;
 #endif
 
+  bool is_swipe_tracking_from_scroll_events_enabled_;
+
   DISALLOW_COPY_AND_ASSIGN(NTPResourceCache);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_NTP_RESOURCE_CACHE_H_