AX: VoiceOver says everything that isn't a link is a "clickable" in Safari reader?
https://bugs.webkit.org/show_bug.cgi?id=114687

Reviewed by Tim Horton.

Source/WebCore: 

VoiceOver is saying all text is clickable, because AXPress is exposed as an action on static text.
That is happening, because there's a click handler on the body element in this case.

I think the best plan to keep existing functionality, but fix this case is not to expose
the press action for static text when the handler is on the body element.

Test: platform/mac/accessibility/press-action-not-exposed-when-body-is-click-handler.html

* accessibility/AccessibilityNodeObject.cpp:
(WebCore::AccessibilityNodeObject::mouseButtonListener):
   Change from checking getAttributeEventListener to hasEventListeners. The former only
   checks if "onclick" is installed on the element and does not work with addEventListener!

* accessibility/AccessibilityObject.cpp:
(WebCore::AccessibilityObject::isAccessibilityObjectSearchMatchAtIndex):
* accessibility/AccessibilityObject.h:
(WebCore::AccessibilityObject::isStaticText):

LayoutTests: 

* platform/mac/accessibility/press-action-not-exposed-when-body-is-click-handler-expected.txt: Added.
* platform/mac/accessibility/press-action-not-exposed-when-body-is-click-handler.html: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148652 268f45cc-cd09-0410-ab3c-d52691b4dbfc