Clean up TCW, make it solely a hub for 1:1 observer/helper objects.

chrome/browser/ui/tab_contents/core_tab_helper.cc

 // Copyright (c) 2011 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/tab_contents/core_tab_helper.h"
 
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/renderer_host/web_cache_manager.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
 #include "content/browser/renderer_host/render_view_host.h"
+#include "content/browser/tab_contents/tab_contents.h"
 #include "content/public/browser/notification_service.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 CoreTabHelper::CoreTabHelper(TabContentsWrapper* wrapper)
     : TabContentsObserver(wrapper->tab_contents()),
       delegate_(NULL),
       wrapper_(wrapper) {
   PrefService* prefs = wrapper_->profile()->GetPrefs();
   if (prefs) {
@@ skipping 81 matching lines @@
             tab_contents()->GetZoomLevel());
       } else {
         NOTREACHED() << "unexpected pref change notification" << *pref_name;
       }
       break;
     }
     default:
       NOTREACHED();
   }
 }