re-commit r181807:

chrome/browser/ui/autofill/autofill_dialog_models.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_AUTOFILL_AUTOFILL_DIALOG_MODELS_H_
 #define CHROME_BROWSER_UI_AUTOFILL_AUTOFILL_DIALOG_MODELS_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 20 matching lines @@
 // index and item GUID.
 class SuggestionsMenuModel : public ui::SimpleMenuModel,
                              public ui::SimpleMenuModel::Delegate {
  public:
   explicit SuggestionsMenuModel(SuggestionsMenuModelDelegate* delegate);
   virtual ~SuggestionsMenuModel();
 
   // Adds an item and its identifying key to the model. Keys needn't be unique.
   void AddKeyedItem(const std::string& key, const string16& display_label);
 
+  // Resets the model to empty.
+  void Reset();
+
   // Returns the ID key for the item at |index|.
   std::string GetItemKeyAt(int index) const;
 
   int checked_item() { return checked_item_; }
 
   // ui::SimpleMenuModel::Delegate implementation.
   virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
   virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
   virtual bool GetAcceleratorForCommandId(
       int command_id,
@@ skipping 41 matching lines @@
  private:
   // The current year (e.g., 2012).
   int this_year_;
 
   DISALLOW_COPY_AND_ASSIGN(YearComboboxModel);
 };
 
 }  // autofill
 
 #endif  // CHROME_BROWSER_UI_AUTOFILL_AUTOFILL_DIALOG_MODELS_H_