Ignores ARIA relations (e.g. aria-labelledby) that point to an invisible target.

third_party/WebKit/Source/modules/accessibility/AXObject.cpp

Index: third_party/WebKit/Source/modules/accessibility/AXObject.cpp
diff --git a/third_party/WebKit/Source/modules/accessibility/AXObject.cpp b/third_party/WebKit/Source/modules/accessibility/AXObject.cpp
index 93d5da6757c41e10e7d36ddac4e1e0927bdb45e7..fa5d1439879eee70d3087366286f91c720e0bf82 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXObject.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXObject.cpp
@@ -37,6 +37,7 @@
 #include "core/html/HTMLFrameOwnerElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/layout/LayoutTheme.h"
+#include "core/style/ComputedStyleConstants.h"
 #include "modules/accessibility/AXObjectCacheImpl.h"
 #include "platform/UserGestureIndicator.h"
 #include "platform/text/PlatformLocale.h"
@@ -900,8 +901,9 @@ void AXObject::elementsFromAttribute(HeapVector<Member<Element>>& elements, cons
 
     TreeScope& scope = getNode()->treeScope();
     for (const auto& id : ids) {
-        if (Element* idElement = scope.getElementById(AtomicString(id)))
+        if (Element* idElement = scope.getElementById(AtomicString(id))) {

[aboxhall, 2016/07/08 17:12:35]

Something weird happened here, does this file need to be in this CL?

             elements.append(idElement);
+        }
     }
 }