Remove wstring from autocomplete.

chrome/browser/tab_contents/render_view_context_menu.cc

 // 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.
 
 #include <algorithm>
 #include <set>
 
 #include "chrome/browser/tab_contents/render_view_context_menu.h"
 
 #include "base/command_line.h"
@@ skipping 574 matching lines @@
 
 void RenderViewContextMenu::AppendSearchProvider() {
   DCHECK(profile_);
 
   TrimWhitespace(params_.selection_text, TRIM_ALL, &params_.selection_text);
   if (params_.selection_text.empty())
     return;
 
   AutocompleteMatch match;
   profile_->GetAutocompleteClassifier()->Classify(
-      UTF16ToWideHack(params_.selection_text),
-      std::wstring(), false, &match, NULL);
+      params_.selection_text, string16(), false, &match, NULL);
   selection_navigation_url_ = match.destination_url;
   if (!selection_navigation_url_.is_valid())
     return;
 
   string16 printable_selection_text = PrintableSelectionText();
   // Escape "&" as "&&".
   for (size_t i = printable_selection_text.find('&'); i != string16::npos;
        i = printable_selection_text.find('&', i + 2))
     printable_selection_text.insert(i, 1, '&');
 
@@ skipping 870 matching lines @@
       profile_->GetPrefs()->GetString(prefs::kAcceptLanguages),
       g_browser_process->clipboard());
 }
 
 void RenderViewContextMenu::MediaPlayerActionAt(
     const gfx::Point& location,
     const WebMediaPlayerAction& action) {
   source_tab_contents_->render_view_host()->MediaPlayerActionAt(
       location, action);
 }