Add initial tests for keyboard access (tabbing in some dialogs)....

views/view.h

Index: views/view.h
===================================================================
--- views/view.h	(revision 53979)
+++ views/view.h	(working copy)
@@ -558,9 +558,14 @@
   // TODO(klink): Move all this out to a AccessibleInfo wrapper class.
 
   // Notify the platform specific accessibility client of changes in the user
-  // interface.
+  // interface.  This will always raise native notifications.
   virtual void NotifyAccessibilityEvent(AccessibilityTypes::Event event_type);
 
+  // Raise an accessibility notification with an option to also raise a native
+  // notification.
+  virtual void NotifyAccessibilityEvent(AccessibilityTypes::Event event_type,
+      bool send_native_event);
+
   // Returns the MSAA default action of the current view. The string returned
   // describes the default action that will occur when executing
   // IAccessible::DoDefaultAction. For instance, default action of a button is