views: remove PlatformStyle::CreateLabelButtonBorder

ui/views/style/platform_style.h

Index: ui/views/style/platform_style.h
diff --git a/ui/views/style/platform_style.h b/ui/views/style/platform_style.h
index bc9eab35332e1e8bba1cdbbb0fb294d051be8170..90e9b82b38c9fa1a8bc60293ac52b2b641a30d7f 100644
--- a/ui/views/style/platform_style.h
+++ b/ui/views/style/platform_style.h
@@ -70,11 +70,6 @@ class VIEWS_EXPORT PlatformStyle {
   static std::unique_ptr<Background> CreateComboboxBackground(
       int shoulder_width);
 
-  // Creates the default label button border for the given |style|. Used when a
-  // custom default border is not provided for a particular LabelButton class.
-  static std::unique_ptr<LabelButtonBorder> CreateLabelButtonBorder(

[sky, 2016/09/23 15:47:39]

Is there any includes/forward declarations no longer necessary please remove
them.

-      Button::ButtonStyle style);
-
   // Creates the default scrollbar for the given orientation.
   static std::unique_ptr<ScrollBar> CreateScrollBar(bool is_horizontal);