https://bugs.webkit.org/show_bug.cgi?id=91794

Reviewed by Chris Fleizach.

Source/WebCore:

Now that it's possible for nodes inside a canvas subtree to be focused and
represent accessible content, accessibility notifications should be triggered
with a Node* rather than with a RenderObject* whenever possible.

Every public API in AXObjectCache that took a RenderObject* before now either
takes a Node* instead, or has a parallel method that takes a Node*.

Tests: accessibility/accessibility-node-memory-management.html
       accessibility/accessibility-node-reparent.html
       accessibility/canvas-fallback-content.html

* accessibility/AXObjectCache.cpp:
(WebCore::AXObjectCache::focusedImageMapUIElement):
(WebCore::AXObjectCache::focusedUIElementForPage):
(WebCore::AXObjectCache::get):
(WebCore::AXObjectCache::getOrCreate):
(WebCore::AXObjectCache::contentChanged):
(WebCore):
(WebCore::AXObjectCache::updateCacheAfterNodeIsAttached):
(WebCore::AXObjectCache::childrenChanged):
(WebCore::AXObjectCache::postNotification):
(WebCore::AXObjectCache::checkedStateChanged):
(WebCore::AXObjectCache::selectedChildrenChanged):
(WebCore::AXObjectCache::nodeTextChangeNotification):
(WebCore::AXObjectCache::handleAriaExpandedChange):
(WebCore::AXObjectCache::handleActiveDescendantChanged):
(WebCore::AXObjectCache::handleAriaRoleChanged):
(WebCore::AXObjectCache::textMarkerDataForVisiblePosition):
(WebCore::AXObjectCache::rootAXEditableElement):
(WebCore::AXObjectCache::nodeIsTextControl):
* accessibility/AXObjectCache.h:
(AXObjectCache):
(WebCore::AXObjectCache::setNodeInUse):
(WebCore::AXObjectCache::removeNodeForUse):
(WebCore::AXObjectCache::isNodeInUse):
(WebCore::AXObjectCache::checkedStateChanged):
(WebCore::AXObjectCache::childrenChanged):
(WebCore::AXObjectCache::contentChanged):
(WebCore::AXObjectCache::updateCacheAfterNodeIsAttached):
(WebCore::AXObjectCache::handleActiveDescendantChanged):
(WebCore::AXObjectCache::handleAriaExpandedChange):
(WebCore::AXObjectCache::handleAriaRoleChanged):
(WebCore::AXObjectCache::handleFocusedUIElementChanged):
(WebCore::AXObjectCache::nodeTextChangeNotification):
(WebCore::AXObjectCache::postNotification):
(WebCore::AXObjectCache::selectedChildrenChanged):
* accessibility/AccessibilityListBoxOption.cpp:
(WebCore::AccessibilityListBoxOption::parentObject):
* accessibility/AccessibilityObject.cpp:
(WebCore::appendAccessibilityObject):
(WebCore::replacedNodeNeedsCharacter):
* accessibility/AccessibilityRenderObject.cpp:
(WebCore::AccessibilityRenderObject::menuForMenuButton):
(WebCore::AccessibilityRenderObject::menuButtonForMenu):
(WebCore::AccessibilityRenderObject::checkboxOrRadioRect):
(WebCore::AccessibilityRenderObject::addRadioButtonGroupMembers):
(WebCore::AccessibilityRenderObject::titleUIElement):
(WebCore::AccessibilityRenderObject::isTabItemSelected):
(WebCore::AccessibilityRenderObject::accessibilityParentForImageMap):
(WebCore::AccessibilityRenderObject::nodeIsTextControl):
(WebCore::AccessibilityRenderObject::activeDescendant):
(WebCore::AccessibilityRenderObject::correspondingControlForLabelElement):
(WebCore::AccessibilityRenderObject::correspondingLabelForControlElement):
* accessibility/AccessibilityRenderObject.h:
(AccessibilityRenderObject):
* accessibility/AccessibilityScrollView.cpp:
(WebCore::AccessibilityScrollView::webAreaObject):
(WebCore::AccessibilityScrollView::parentObject):
(WebCore::AccessibilityScrollView::parentObjectIfExists):
* accessibility/chromium/AXObjectCacheChromium.cpp:
(WebCore::AXObjectCache::postPlatformNotification):
(WebCore::AXObjectCache::handleFocusedUIElementChanged):
* accessibility/gtk/AXObjectCacheAtk.cpp:
(WebCore::AXObjectCache::handleFocusedUIElementChanged):
* accessibility/mac/AXObjectCacheMac.mm:
(WebCore::AXObjectCache::handleFocusedUIElementChanged):
* accessibility/win/AXObjectCacheWin.cpp:
(WebCore::AXObjectCache::handleFocusedUIElementChanged):
* bindings/cpp/WebDOMCustomVoidCallback.cpp:
(toWebCore):
* dom/Document.cpp:
(WebCore::Document::setFocusedNode):
* dom/Element.cpp:
(WebCore::Element::attributeChanged):
* dom/Node.cpp:
(WebCore::Node::~Node):
(WebCore::Node::attach):
* editing/AppendNodeCommand.cpp:
(WebCore::sendAXTextChangedIgnoringLineBreaks):
* editing/DeleteFromTextNodeCommand.cpp:
(WebCore::DeleteFromTextNodeCommand::doApply):
(WebCore::DeleteFromTextNodeCommand::doUnapply):
* editing/Editor.cpp:
(WebCore::Editor::respondToChangedContents):
(WebCore::Editor::markAndReplaceFor):
* editing/InsertIntoTextNodeCommand.cpp:
(WebCore::InsertIntoTextNodeCommand::doApply):
(WebCore::InsertIntoTextNodeCommand::doUnapply):
* editing/InsertNodeBeforeCommand.cpp:
(WebCore::InsertNodeBeforeCommand::doApply):
(WebCore::InsertNodeBeforeCommand::doUnapply):
* editing/chromium/FrameSelectionChromium.cpp:
(WebCore::FrameSelection::notifyAccessibilityForSelectionChange):
* html/HTMLInputElement.cpp:
(WebCore::HTMLInputElement::setChecked):
* html/HTMLSelectElement.cpp:
(WebCore::HTMLSelectElement::childrenChanged):
(WebCore::HTMLSelectElement::optionElementChildrenChanged):
* html/HTMLTextFormControlElement.cpp:
(WebCore::HTMLTextFormControlElement::setInnerTextValue):
* html/InputType.cpp:
(WebCore::InputType::applyStep):
* html/RangeInputType.cpp:
(WebCore::RangeInputType::handleKeydownEvent):
* page/FocusController.cpp:
(WebCore::FocusController::setInitialFocus):

LayoutTests:

New tests:
- canvas-fallback-content tests that objects in a canvas subtree can be
  focused and then you can retrieve the role of the accessible object.
- accessibility-node-memory-management ensures that an AccessibilityNodeObject
  is detached when its node is destroyed.
- accessibility-node-reparent ensures that if an AccessibilityNodeObject is
  created for a node without a renderer, but the node later gets a renderer,
  the AccessibilityNodeObject is detached and an AccessibilityRenderObject is
  created instead.

* accessibility/accessibility-node-memory-management-expected.txt: Added.
* accessibility/accessibility-node-memory-management.html: Added.
* accessibility/accessibility-node-reparent-expected.txt: Added.
* accessibility/accessibility-node-reparent.html: Added.
* accessibility/canvas-fallback-content-expected.txt: Added.
* accessibility/canvas-fallback-content.html: Added.
* platform/gtk/TestExpectations:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@125710 268f45cc-cd09-0410-ab3c-d52691b4dbfc