Migrate CandidateWindow::Entry to string16.

ui/base/ime/candidate_window.cc

 // Copyright 2014 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 "ui/base/ime/candidate_window.h"
 
 #include <string>
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
@@ skipping 52 matching lines @@
   *has_highlighted = false;
 
   const size_t cursor_index_in_page = cursor_position() % page_size();
 
   for (size_t i = 0; i < candidates().size(); ++i) {
     const CandidateWindow::Entry& candidate_entry = candidates()[i];
     if (candidate_entry.description_title.empty() &&
         candidate_entry.description_body.empty())
       continue;
 
-    InfolistEntry entry(base::UTF8ToUTF16(candidate_entry.description_title),
-                        base::UTF8ToUTF16(candidate_entry.description_body));
+    InfolistEntry entry(candidate_entry.description_title,
+                        candidate_entry.description_body);
     if (i == cursor_index_in_page) {
       entry.highlighted = true;
       *has_highlighted = true;
     }
     infolist_entries->push_back(entry);
   }
 }
 
 // When the default values are changed, please modify
 // InputMethodEngineInterface::CandidateWindowProperty too.
 CandidateWindow::CandidateWindowProperty::CandidateWindowProperty()
     : page_size(kDefaultPageSize),
       cursor_position(0),
       is_cursor_visible(true),
       is_vertical(false),
       show_window_at_composition(false),
       is_auxiliary_text_visible(false) {
 }
 
 CandidateWindow::CandidateWindowProperty::~CandidateWindowProperty() {
 }
 
 CandidateWindow::Entry::Entry() {
 }
 
 CandidateWindow::Entry::~Entry() {
 }
 
 }  // namespace ui