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

third_party/WebKit/LayoutTests/svg/dynamic-updates/resources/SVGTestCase.js

 // Force activating pixel tests - this variable is used in resources/js-test.js, when calling setDumpAsText().
 window.enablePixelTesting = true;
 
 var svgNS = "http://www.w3.org/2000/svg";
 var xlinkNS = "http://www.w3.org/1999/xlink";
 var xhtmlNS = "http://www.w3.org/1999/xhtml";
 
 var rootSVGElement;
 var iframeElement;
 
@@ skipping 47 matching lines @@
     var bodyElement = document.documentElement.lastChild;
     bodyElement.insertBefore(iframeElement, document.getElementById("description"));
 }
 
 function iframeLoaded() {
     rootSVGElement = iframeElement.getSVGDocument().rootElement;
 }
 
 function clickAt(x, y) {
     // Translation due to <h1> above us
-    x = x + rootSVGElement.offsetLeft;
-    y = y + rootSVGElement.offsetTop;
+    var clientRect = rootSVGElement.getBoundingClientRect();
+    x = x + clientRect.left;
+    y = y + clientRect.top;
 
     if (window.eventSender) {
         eventSender.mouseMoveTo(x, y);
         eventSender.mouseDown();
         eventSender.mouseUp();
     }
 }