MacViews: Enable RenderTextHarfBuzz to get Textfields to work.

ui/gfx/render_text.cc

Index: ui/gfx/render_text.cc
diff --git a/ui/gfx/render_text.cc b/ui/gfx/render_text.cc
index 50ef6440e33fbfe8048b1cedb210c8cb40d9eb20..1a91b98878a0b61746fa398c5a9f75dcf82485ba 100644
--- a/ui/gfx/render_text.cc
+++ b/ui/gfx/render_text.cc
@@ -412,11 +412,17 @@ RenderText::~RenderText() {
 }
 
 RenderText* RenderText::CreateInstance() {
+#if defined(OS_MACOSX) && defined(TOOLKIT_VIEWS)
+  // views::Textfield requires RenderTextHarfBuzz on Mac because RenderTextMac's

[msw, 2014/06/10 23:23:47]

nit: Textfield is the heaviest user, but I'm planning on converting views::Label
to cache RenderText instances. You could generalize the comment to something
like "Use the more complete HarfBuzz implementation for Views controls on Mac."

+  // implementation is not complete.
+  return new RenderTextHarfBuzz;
+#else
   if (CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableHarfBuzzRenderText)) {
     return new RenderTextHarfBuzz;
   }
   return CreateNativeInstance();
+#endif
 }
 
 void RenderText::SetText(const base::string16& text) {