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

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

Index: third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
diff --git a/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp b/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
index cf28e553d312c292124916237f4dd6051d5092b5..9e266fc14a077c5998e138284bac36cf3db75b92 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
@@ -1269,27 +1269,27 @@ String AXLayoutObject::textAlternative(bool recursive, bool inAriaLabelledByTrav
 
 void AXLayoutObject::ariaFlowToElements(AXObjectVector& flowTo) const
 {
-    accessibilityChildrenFromAttribute(aria_flowtoAttr, flowTo);
+    accessibilityChildrenFromAttribute(aria_flowtoAttr, flowTo, false /* includeHiddenObjects */);
 }
 
 void AXLayoutObject::ariaControlsElements(AXObjectVector& controls) const
 {
-    accessibilityChildrenFromAttribute(aria_controlsAttr, controls);
+    accessibilityChildrenFromAttribute(aria_controlsAttr, controls, false /* includeHiddenObjects */);
 }
 
 void AXLayoutObject::ariaOwnsElements(AXObjectVector& owns) const
 {
-    accessibilityChildrenFromAttribute(aria_ownsAttr, owns);
+    accessibilityChildrenFromAttribute(aria_ownsAttr, owns, false /* includeHiddenObjects */);
 }
 
 void AXLayoutObject::ariaDescribedbyElements(AXObjectVector& describedby) const
 {
-    accessibilityChildrenFromAttribute(aria_describedbyAttr, describedby);
+    accessibilityChildrenFromAttribute(aria_describedbyAttr, describedby, true /* includeHiddenObjects */);
 }
 
 void AXLayoutObject::ariaLabelledbyElements(AXObjectVector& labelledby) const
 {
-    accessibilityChildrenFromAttribute(aria_labelledbyAttr, labelledby);
+    accessibilityChildrenFromAttribute(aria_labelledbyAttr, labelledby, true /* includeHiddenObjects */);
 }
 
 bool AXLayoutObject::ariaHasPopup() const