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

chrome/browser/ui/prefs/prefs_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/prefs/prefs_tab_helper.h"
 
 #include "base/stringprintf.h"
 #include "base/string_util.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/renderer_preferences_util.h"
 #include "chrome/browser/themes/theme_service.h"
 #include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/browser/ui/constrained_window_tab_helper.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_details.h"
 #include "content/public/browser/notification_service.h"
 #include "grit/locale_settings.h"
 #include "grit/platform_locale_settings.h"
 #include "webkit/glue/webpreferences.h"
 
 namespace {
 
 const char* kPerTabPrefsToObserve[] = {
     prefs::kWebKitJavascriptEnabled
@@ skipping 397 matching lines @@
   prefs.javascript_enabled =
       per_tab_prefs_->GetBoolean(prefs::kWebKitJavascriptEnabled);
   tab_contents()->render_view_host()->UpdateWebkitPreferences(prefs);
 }
 
 void PrefsTabHelper::UpdateRendererPreferences() {
   renderer_preferences_util::UpdateFromSystemSettings(
       tab_contents()->GetMutableRendererPrefs(), wrapper_->profile());
   tab_contents()->render_view_host()->SyncRendererPrefs();
 }