Update SVG tests ahead of offset* removal

third_party/WebKit/LayoutTests/resources/check-layout-th.js

 (function() {
 // Test is initiated from body.onload, so explicit done() call is required.
 setup({ explicit_done: true });
 
 function checkSubtreeExpectedValues(t, parent, prefix)
 {
     var checkedLayout = checkExpectedValues(t, parent, prefix);
     Array.prototype.forEach.call(parent.childNodes, function(node) {
         checkedLayout |= checkSubtreeExpectedValues(t, node, prefix);
     });
@@ skipping 51 matching lines @@
     var expectedWidth = checkAttribute(output, node, "data-expected-scroll-width");
     if (expectedWidth) {
         assert_tolerance(node.scrollWidth, expectedWidth, prefix + "scrollWidth");
     }
 
     var expectedHeight = checkAttribute(output, node, "data-expected-scroll-height");
     if (expectedHeight) {
         assert_tolerance(node.scrollHeight, expectedHeight, prefix + "scrollHeight");
     }
 
+    var expectedWidth = checkAttribute(output, node, "data-expected-bounding-client-rect-width");
+    if (expectedWidth) {
+        assert_tolerance(node.getBoundingClientRect().width, expectedWidth, prefix + "getBoundingClientRect().width");
+    }
+
     var expectedOffset = checkAttribute(output, node, "data-total-x");
     if (expectedOffset) {
         var totalLeft = node.clientLeft + node.offsetLeft;
         assert_tolerance(totalLeft, expectedOffset, prefix +
                          "clientLeft+offsetLeft (" + node.clientLeft + " + " + node.offsetLeft + ")");
     }
 
     var expectedOffset = checkAttribute(output, node, "data-total-y");
     if (expectedOffset) {
         var totalTop = node.clientTop + node.offsetTop;
@@ skipping 99 matching lines @@
             }
         }, selectorList + ' ' + String(++testNumber));
     });
     if (!checkedLayout) {
         console.error("No valid data-* attributes found in selector list : " + selectorList);
     }
     done();
 };
 
 })();