Migrate CandidateWindow::Entry to string16.

chrome/browser/chromeos/input_method/candidate_window_controller_impl.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_CHROMEOS_INPUT_METHOD_CANDIDATE_WINDOW_CONTROLLER_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_CANDIDATE_WINDOW_CONTROLLER_IMPL_H_
 
 #include "chrome/browser/chromeos/input_method/candidate_window_controller.h"
 
 #include "ash/ime/candidate_window_view.h"
@@ skipping 53 matching lines @@
 
   // views::WidgetObserver implementation.
   virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE;
 
   // IBusPanelCandidateWindowHandlerInterface implementation.
   virtual void SetCursorBounds(const gfx::Rect& cursor_bounds,
                                const gfx::Rect& composition_head) OVERRIDE;
   virtual void UpdateLookupTable(
       const ui::CandidateWindow& candidate_window,
       bool visible) OVERRIDE;
-  virtual void UpdatePreeditText(const std::string& utf8_text,
+  virtual void UpdatePreeditText(const base::string16& text,
                                  unsigned int cursor, bool visible) OVERRIDE;
   virtual void FocusStateChanged(bool is_focused) OVERRIDE;
 
   void InitCandidateWindowView();
 
   // The candidate window view.
   ash::ime::CandidateWindowView* candidate_window_view_;
 
   // This is the outer frame of the infolist window view. Owned by the widget.
   ash::ime::InfolistWindow* infolist_window_;
@@ skipping 10 matching lines @@
 
   ObserverList<CandidateWindowController::Observer> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(CandidateWindowControllerImpl);
 };
 
 #endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_CANDIDATE_WINDOW_CONTROLLER_IMPL_H_
 
 }  // namespace input_method
 }  // namespace chromeos