[GTK] Refactor GTK's accessibilitity code to be more modular

[GTK] Refactor GTK's accessibilitity code to be more modular
https://bugs.webkit.org/show_bug.cgi?id=76783

Reviewed by Martin Robinson.

Source/WebCore:

Rename WebKitAccessible's public functions to follow WebKit's
coding style and update callers.

* accessibility/gtk/WebKitAccessibleWrapperAtk.cpp:
(webkitAccessibleNew): Renamed from webkit_accessible_new.
(webkitAccessibleGetAccessibilityObject): Likewise.
(webkitAccessibleDetach):Likewise.
(webkitAccessibleGetFocusedElement): Likewise.
* accessibility/gtk/WebKitAccessibleWrapperAtk.h:

Update calls to WebKitAccessible's public functions.

* accessibility/gtk/AXObjectCacheAtk.cpp:
(WebCore::AXObjectCache::detachWrapper): Update call.
(WebCore::AXObjectCache::attachWrapper): Ditto.
* accessibility/gtk/WebKitAccessibleHyperlink.cpp:
(core): Update call.

Source/WebKit/gtk:

Update callers to WebKitAccessible's public functions.

* WebCoreSupport/DumpRenderTreeSupportGtk.cpp:
(DumpRenderTreeSupportGtk::getFocusedAccessibleElement):
(modifyAccessibilityValue):
(DumpRenderTreeSupportGtk::accessibilityHelpText):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105607 268f45cc-cd09-0410-ab3c-d52691b4dbfc