An edit for SetText needs to be merged with previous edit for omnibox.

views/controls/textfield/native_textfield_win.h

 // 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.
 
 #ifndef VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_WIN_H_
 #define VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_WIN_H_
 #pragma once
 
 #include <atlbase.h>
 #include <atlapp.h>
@@ skipping 72 matching lines @@
   virtual size_t GetCursorPosition() const OVERRIDE;
   virtual bool HandleKeyPressed(const views::KeyEvent& event) OVERRIDE;
   virtual bool HandleKeyReleased(const views::KeyEvent& event) OVERRIDE;
   virtual void HandleFocus() OVERRIDE;
   virtual void HandleBlur() OVERRIDE;
   virtual TextInputClient* GetTextInputClient() OVERRIDE;
   virtual TextStyle* CreateTextStyle() OVERRIDE;
   virtual void ApplyTextStyle(const TextStyle* style,
                               const ui::Range& range) OVERRIDE;
   virtual void ClearAllTextStyles() OVERRIDE;
+  virtual void ClearEditHistory() OVERRIDE;
 
   // Overridden from ui::SimpleMenuModel::Delegate:
   virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
   virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
   virtual bool GetAcceleratorForCommandId(
       int command_id,
       ui::Accelerator* accelerator) OVERRIDE;
   virtual void ExecuteCommand(int command_id) OVERRIDE;
 
   // Update accessibility information.
@@ skipping 176 matching lines @@
 
   //  The accessibility state of this object.
   int accessibility_state_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeTextfieldWin);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_WIN_H_