Deprecate Element.offsetParent/offsetTop/offsetLeft/offsetWidth/offsetHeight

Source/core/dom/Element.idl

Index: Source/core/dom/Element.idl
diff --git a/Source/core/dom/Element.idl b/Source/core/dom/Element.idl
index 2d0574cfa815845e8441d21b7fbdeb810a129890..f89083b282dd9c3283e36f77c6da6a0c60256df4 100644
--- a/Source/core/dom/Element.idl
+++ b/Source/core/dom/Element.idl
@@ -96,12 +96,12 @@
     readonly attribute long clientWidth;
     readonly attribute long clientHeight;
     // http://dev.w3.org/csswg/cssom-view/#extensions-to-the-htmlelement-interface
-    // FIXME: offset* should only be on HTMLElement.
-    [MeasureAs=ElementOffsetParent, PerWorldBindings] readonly attribute Element? offsetParent;
-    [MeasureAs=ElementOffsetTop] readonly attribute long offsetTop;
-    [MeasureAs=ElementOffsetLeft] readonly attribute long offsetLeft;
-    [MeasureAs=ElementOffsetWidth] readonly attribute long offsetWidth;
-    [MeasureAs=ElementOffsetHeight] readonly attribute long offsetHeight;
+    // FIXME: offset* should only be on HTMLElement. crbug.com/504578
+    [DeprecateAs=ElementOffsetParent, PerWorldBindings] readonly attribute Element? offsetParent;
+    [DeprecateAs=ElementOffsetTop] readonly attribute long offsetTop;
+    [DeprecateAs=ElementOffsetLeft] readonly attribute long offsetLeft;
+    [DeprecateAs=ElementOffsetWidth] readonly attribute long offsetWidth;
+    [DeprecateAs=ElementOffsetHeight] readonly attribute long offsetHeight;
 
     // Non-standard APIs
     // https://www.w3.org/Bugs/Public/show_bug.cgi?id=19962