Use Chrome facilities for omnibox state save and restore on Mac.

chrome/browser/autocomplete/autocomplete_edit_view_mac.h

 // Copyright (c) 2009 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_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_VIEW_MAC_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_VIEW_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/basictypes.h"
@@ skipping 25 matching lines @@
                           NSTextField* field);
   virtual ~AutocompleteEditViewMac();
 
   // Implement the AutocompleteEditView interface.
   // TODO(shess): See if this couldn't be simplified to:
   //    virtual AEM* model() const { ... }
   virtual AutocompleteEditModel* model() { return model_.get(); }
   virtual const AutocompleteEditModel* model() const { return model_.get(); }
 
   virtual void SaveStateToTab(TabContents* tab);
-  virtual void Update(const TabContents* tab_for_state_restoring) {
-    NOTIMPLEMENTED();
-  }
+  virtual void Update(const TabContents* tab_for_state_restoring);
 
   virtual void OpenURL(const GURL& url,
                        WindowOpenDisposition disposition,
                        PageTransition::Type transition,
                        const GURL& alternate_nav_url,
                        size_t selected_line,
                        const std::wstring& keyword);
 
   virtual std::wstring GetText() const;
-  virtual void SetUserText(const std::wstring& text) { NOTIMPLEMENTED(); }
+  virtual void SetUserText(const std::wstring& text) {
+    SetUserText(text, text, true);
+  }
   virtual void SetUserText(const std::wstring& text,
                            const std::wstring& display_text,
-                           bool update_popup) { NOTIMPLEMENTED(); }
+                           bool update_popup);
 
   virtual void SetWindowTextAndCaretPos(const std::wstring& text,
                                         size_t caret_pos);
 
   virtual bool IsSelectAll() {
     NOTIMPLEMENTED();
     return false;
   }
 
   virtual void SelectAll(bool reversed);
@@ skipping 44 matching lines @@
 
   // Tracking state before and after a possible change for reporting
   // to model_.
   NSRange selection_before_change_;
   std::wstring text_before_change_;
 
   DISALLOW_COPY_AND_ASSIGN(AutocompleteEditViewMac);
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_VIEW_MAC_H_