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 de4278796dea578917a64f66ea5f83f1a22d7d56..250817d3314e8ad8ecfa16d8233fd26829251b0e 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
@@ -1237,14 +1237,6 @@ 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);
 }