ozone: Allow building for ozone without depending on pango

ui/gfx/render_text_ozone.cc

Index: ui/gfx/render_text_ozone.cc
diff --git a/ui/base/models/dialog_model.cc b/ui/gfx/render_text_ozone.cc
similarity index 58%
copy from ui/base/models/dialog_model.cc
copy to ui/gfx/render_text_ozone.cc
index 310bff04c5027dee495cf98b5f4512dda1a3fc46..058b5a6389dd1dd3d822a3615c469a66d9aec1c2 100644
--- a/ui/base/models/dialog_model.cc
+++ b/ui/gfx/render_text_ozone.cc
@@ -2,11 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ui/base/models/dialog_model.h"
+#include "ui/gfx/render_text.h"
 
-namespace ui {
+namespace gfx {
 
-DialogModel::~DialogModel() {
+RenderText* RenderText::CreateInstance() {
+  return NULL;
 }
 
-}  // namespace ui
+}  // namespace gfx