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dmazzoni@google.com authored
https://bugs.webkit.org/show_bug.cgi?id=97825 Reviewed by Ryosuke Niwa. Source/WebCore: Adds a DocumentOrderedMap to TreeScope that allows accessibility to quickly map from an id to the label for that id. This speeds up AccessibilityNode::labelForElement, which was a bottleneck in Chromium when accessibility was on. Tests: accessibility/title-ui-element-correctness.html perf/accessibility-title-ui-element.html * accessibility/AccessibilityNodeObject.cpp: (WebCore::AccessibilityNodeObject::labelForElement): * dom/DocumentOrderedMap.cpp: (WebCore::keyMatchesLabelForAttribute): (WebCore): (WebCore::DocumentOrderedMap::get): (WebCore::DocumentOrderedMap::getElementByLabelForAttribute): * dom/DocumentOrderedMap.h: (DocumentOrderedMap): * dom/Element.cpp: (WebCore::Element::insertedInto): (WebCore::Element::removedFrom): (WebCore::Element::updateLabel): (WebCore): (WebCore::Element::willModifyAttribute): * dom/Element.h: (Element): * do...
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