https://bugs.webkit.org/show_bug.cgi?id=119883

Tools:

Implemented the notification listener for AccessibilityUIElement. The signal is generated
by AXObjectCache::postPlatformNotification() and received by axObjectEventListener().
axObjectEventListener will then invoke JSObjectCallAsFunction() with the respective
callback function. The global callback function and callbacks for specific elements are
stored in a HashMap in AccessibilityCallbacksAtk.cpp.

Patch by Denis Nomiyama <d.nomiyama@samsung.com> on 2013-08-27
Reviewed by Chris Fleizach.

* DumpRenderTree/AccessibilityUIElement.h: Added a notification handler for GTK+
* DumpRenderTree/atk/AccessibilityCallbacks.h: Added addAccessibilityNotificationListener()
and removeAccessibilityNotificationListener()
* DumpRenderTree/atk/AccessibilityCallbacksAtk.cpp:
(axObjectEventListener): Call JS callback for global notification or for a specific element
(disconnectAccessibilityCallbacks): Only disconnect if logging is off and there is no
notification handler
(addAccessibilityNotificationHandler): Add notification listener to the list
(removeAccessibilityNotificationHandler): Remove notification listener from the list
* DumpRenderTree/atk/AccessibilityControllerAtk.cpp:
(AccessibilityController::setLogAccessibilityEvents): Set logging off before disconnecting
* DumpRenderTree/atk/AccessibilityNotificationHandlerAtk.cpp: Added.
(AccessibilityNotificationHandler::AccessibilityNotificationHandler): Create handler
(AccessibilityNotificationHandler::~AccessibilityNotificationHandler): Destroy handler.
Remove handler from the list and disconnect callbacks
(AccessibilityNotificationHandler::setNotificationFunctionCallback): Set the notification
callback and connect callbacks to signals
* DumpRenderTree/atk/AccessibilityNotificationHandlerAtk.h: Added.
(AccessibilityNotificationHandler::setPlatformElement): Set platform element
(AccessibilityNotificationHandler::platformElement): Get platform element
(AccessibilityNotificationHandler::notificationFunctionCallback): Get notification callback
* DumpRenderTree/atk/AccessibilityUIElementAtk.cpp:
(AccessibilityUIElement::addNotificationListener): Create notification handler, set the
platform element and the notification callback
(AccessibilityUIElement::removeNotificationListener):
* DumpRenderTree/efl/CMakeLists.txt: Added AccessibilityNotificationHandlerAtk.cpp/h
* GNUmakefile.am: Added AccessibilityNotificationHandlerAtk.cpp/h

LayoutTests:

Unskipped the checkbox notification test in a11y and added the expected results.

Patch by Denis Nomiyama <d.nomiyama@samsung.com> on 2013-08-27
Reviewed by Chris Fleizach.

* platform/gtk/TestExpectations: Unskipped the checkbox notification test in a11y.
* platform/gtk/accessibility/aria-checkbox-sends-notification-expected.txt: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@154697 268f45cc-cd09-0410-ab3c-d52691b4dbfc