MacViews: Use RenderTextHarfBuzz only for Textfields

ui/gfx/render_text_win.cc

Index: ui/gfx/render_text_win.cc
diff --git a/ui/gfx/render_text_win.cc b/ui/gfx/render_text_win.cc
index 0ca29577399f118ebdb4f0109b480a844d49bf6f..c459bc9f18936646956c6aea4f3894457cd7bd7e 100644
--- a/ui/gfx/render_text_win.cc
+++ b/ui/gfx/render_text_win.cc
@@ -476,6 +476,10 @@ RenderTextWin::RenderTextWin() : RenderText(), needs_layout_(false) {
 
 RenderTextWin::~RenderTextWin() {}
 
+scoped_ptr<RenderText> RenderTextWin::NewInstance() const {
+  return scoped_ptr<RenderTextWin>(new RenderTextWin);
+}
+
 Size RenderTextWin::GetStringSize() {
   EnsureLayout();
   return multiline_string_size_;