Remove DialogDelegate::UseNewStyle and unused code.

ui/views/widget/widget.cc

Index: ui/views/widget/widget.cc
diff --git a/ui/views/widget/widget.cc b/ui/views/widget/widget.cc
index d3af615e107fdafb18ae9b27ac723d52f739e9ce..7cbfd90d82bcad9ad5a12cc17c6d530d1967b5ca 100644
--- a/ui/views/widget/widget.cc
+++ b/ui/views/widget/widget.cc
@@ -252,25 +252,19 @@ Widget* Widget::CreateWindowWithContextAndBounds(WidgetDelegate* delegate,
 
 // static
 Widget* Widget::CreateWindowAsFramelessChild(WidgetDelegate* widget_delegate,
-                                             gfx::NativeView parent,
-                                             gfx::NativeView new_style_parent) {
+                                             gfx::NativeView parent) {
   views::Widget* widget = new views::Widget;
 
   views::Widget::InitParams params;
   params.delegate = widget_delegate;
   params.child = true;
-  if (views::DialogDelegate::UseNewStyle()) {
-    params.parent = new_style_parent;
-    params.remove_standard_frame = true;
+  params.parent = parent;
+  params.remove_standard_frame = true;
 #if defined(USE_AURA)
-    params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
+  params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
 #endif
-  } else {
-    params.parent = parent;
-  }
 
   widget->Init(params);
-
   return widget;
 }