Fix the absence of padding on some UI buttons.

ui/views/views_delegate.h

Index: ui/views/views_delegate.h
diff --git a/ui/views/views_delegate.h b/ui/views/views_delegate.h
index b354330b9815db6c60b91b369a8655f8a2ccffe6..7b3960f5c7c0a5be23772d6cc4b7d72f7064d5c2 100644
--- a/ui/views/views_delegate.h
+++ b/ui/views/views_delegate.h
@@ -219,7 +219,10 @@ class VIEWS_EXPORT ViewsDelegate {
   // Returns the margins that should be applied around a bubble dialog.
   virtual gfx::Insets GetBubbleDialogMargins() const;
 
-  // Returns the default minimum width of a dialog button.
+  // Returns the default minimum width of a button.
+  virtual int GetButtonMinimumWidth() const;
+
+  // Returns the minimum width of a dialog button.
   virtual int GetDialogButtonMinimumWidth() const;
 
   // Returns the default padding to add on each side of a button's label.