Support accDoDefaultAction for NativeButton in ViewAccessibility....

views/accessibility/view_accessibility.h

Index: views/accessibility/view_accessibility.h
===================================================================
--- views/accessibility/view_accessibility.h	(revision 70902)
+++ views/accessibility/view_accessibility.h	(working copy)
@@ -48,6 +48,9 @@
   // Retrieves the child element or child object at a given point on the screen.
   STDMETHODIMP accHitTest(LONG x_left, LONG y_top, VARIANT* child);
 
+  // Performs the object's default action.
+  STDMETHODIMP accDoDefaultAction(VARIANT var_id);
+
   // Retrieves the specified object's current screen location.
   STDMETHODIMP accLocation(LONG* x_left,
                            LONG* y_top,
@@ -93,9 +96,6 @@
 
   // Non-supported IAccessible methods.
 
-  // Out-dated and can be safely said to be very rarely used.
-  STDMETHODIMP accDoDefaultAction(VARIANT var_id);
-
   // Selections not applicable to views.
   STDMETHODIMP get_accSelection(VARIANT* selected);
   STDMETHODIMP accSelect(LONG flags_sel, VARIANT var_id);