Adding SpinButtonRole in isClickable()

Source/modules/accessibility/AXObject.cpp

 /*
  * Copyright (C) 2008, 2009, 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 234 matching lines @@
     case CheckBoxRole:
     case ColorWellRole:
     case ComboBoxRole:
     case EditableTextRole:
     case ImageMapLinkRole:
     case LinkRole:
     case ListBoxOptionRole:
     case MenuButtonRole:
     case PopUpButtonRole:
     case RadioButtonRole:
+    case SpinButtonRole:
     case TabRole:
     case TextAreaRole:
     case TextFieldRole:
     case ToggleButtonRole:
         return true;
     default:
         return false;
     }
 }
 
@@ skipping 714 matching lines @@
         return ToggleButtonRole;
     if (ariaHasPopup())
         return PopUpButtonRole;
     // We don't contemplate RadioButtonRole, as it depends on the input
     // type.
 
     return ButtonRole;
 }
 
 } // namespace blink