Add sparse accessibility attribute interface to Blink

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 7024ba02f2ed1af06adf6811a8dabe92fb506608..5c087ffe7623667335d3fcf3725fc66110496a07 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
@@ -1236,14 +1236,6 @@ String AXLayoutObject::textAlternative(bool recursive,
 // ARIA attributes.
 //
 
-void AXLayoutObject::ariaFlowToElements(AXObjectVector& flowTo) const {
-  accessibilityChildrenFromAttribute(aria_flowtoAttr, flowTo);
-}
-
-void AXLayoutObject::ariaControlsElements(AXObjectVector& controls) const {
-  accessibilityChildrenFromAttribute(aria_controlsAttr, controls);
-}
-
 void AXLayoutObject::ariaOwnsElements(AXObjectVector& owns) const {
   accessibilityChildrenFromAttribute(aria_ownsAttr, owns);
 }