Remove per-tab preference machinery.

chrome/browser/ui/tab_contents/tab_contents_wrapper.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_TAB_CONTENTS_TAB_CONTENTS_WRAPPER_H_
 #define CHROME_BROWSER_UI_TAB_CONTENTS_TAB_CONTENTS_WRAPPER_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 188 matching lines @@
   WebIntentPickerController* web_intent_picker_controller() {
     return web_intent_picker_controller_.get();
   }
 
   // Overrides -----------------------------------------------------------------
 
   // content::WebContentsObserver overrides:
   virtual void WebContentsDestroyed(content::WebContents* tab) OVERRIDE;
 
  private:
-  friend class PrefsTabHelperTest;
-
   // Used to retrieve this object from |web_contents_|, which is placed in
   // its property bag to avoid adding additional interfaces.
   static base::PropertyAccessor<TabContentsWrapper*>* property_accessor();
 
   // Tab Helpers ---------------------------------------------------------------
   // (These provide API for callers and have a getter function listed in the
   // "Tab Helpers" section in the member functions area, above.)
 
   scoped_ptr<AutocompleteHistoryManager> autocomplete_history_manager_;
   scoped_refptr<AutofillManager> autofill_manager_;
@@ skipping 62 matching lines @@
 
   // The supporting objects need to outlive the WebContents dtor (as they may
   // be called upon during its execution). As a result, this must come last
   // in the list.
   scoped_ptr<content::WebContents> web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(TabContentsWrapper);
 };
 
 #endif  // CHROME_BROWSER_UI_TAB_CONTENTS_TAB_CONTENTS_WRAPPER_H_