Remove wstring from autocomplete.

chrome/browser/ui/views/location_bar/keyword_hint_view.h

 // Copyright (c) 2010 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_VIEWS_LOCATION_BAR_KEYWORD_HINT_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_KEYWORD_HINT_VIEW_H_
 #pragma once
 
 #include <string>
 
@@ skipping 18 matching lines @@
 // couldn't bring myself to use such a long name.
 class KeywordHintView : public views::View {
  public:
   explicit KeywordHintView(Profile* profile);
   virtual ~KeywordHintView();
 
   void SetFont(const gfx::Font& font);
 
   void SetColor(const SkColor& color);
 
-  void SetKeyword(const std::wstring& keyword);
-  std::wstring keyword() const { return keyword_; }
+  void SetKeyword(const string16& keyword);
+  string16 keyword() const { return keyword_; }
 
   virtual void Paint(gfx::Canvas* canvas);
   virtual gfx::Size GetPreferredSize();
   // The minimum size is just big enough to show the tab.
   virtual gfx::Size GetMinimumSize();
   virtual void Layout();
 
   void set_profile(Profile* profile) { profile_ = profile; }
 
  private:
   views::Label* leading_label_;
   views::Label* trailing_label_;
 
   // The keyword.
-  std::wstring keyword_;
+  string16 keyword_;
 
   Profile* profile_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(KeywordHintView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_KEYWORD_HINT_VIEW_H_