MacViews: Use RenderTextHarfBuzz only for Textfields

ui/gfx/render_text_win.cc

 // 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.
 
 #include "ui/gfx/render_text_win.h"
 
 #include <algorithm>
 
 #include "base/i18n/break_iterator.h"
 #include "base/i18n/char_iterator.h"
@@ skipping 458 matching lines @@
 
 RenderTextWin::RenderTextWin() : RenderText(), needs_layout_(false) {
   set_truncate_length(kMaxUniscribeTextLength);
   memset(&script_control_, 0, sizeof(script_control_));
   memset(&script_state_, 0, sizeof(script_state_));
   MoveCursorTo(EdgeSelectionModel(CURSOR_LEFT));
 }
 
 RenderTextWin::~RenderTextWin() {}
 
+scoped_ptr<RenderText> RenderTextWin::CreateInstanceOfSameType() const {
+  return scoped_ptr<RenderTextWin>(new RenderTextWin);
+}
+
 Size RenderTextWin::GetStringSize() {
   EnsureLayout();
   return multiline_string_size_;
 }
 
 SelectionModel RenderTextWin::FindCursorPosition(const Point& point) {
   if (text().empty())
     return SelectionModel();
 
   EnsureLayout();
@@ skipping 759 matching lines @@
   size_t position = LayoutIndexToTextIndex(run->range.end());
   position = IndexOfAdjacentGrapheme(position, CURSOR_BACKWARD);
   return SelectionModel(position, CURSOR_FORWARD);
 }
 
 RenderText* RenderText::CreateNativeInstance() {
   return new RenderTextWin;
 }
 
 }  // namespace gfx