[New Multicolumn] Make offsetLeft, offsetTop and getClientRects() behave.

LayoutTests/resources/js-test.js

 // svg/dynamic-updates tests set enablePixelTesting=true, as we want to dump text + pixel results
 if (self.testRunner) {
     if (self.enablePixelTesting)
         testRunner.dumpAsTextWithPixelResults();
     else
         testRunner.dumpAsText();
 }
 
 var description, debug, successfullyParsed;
 
@@ skipping 514 matching lines @@
   }
 
   if (_exception)
     testFailed(_a + " should be defined. Threw exception " + _exception);
   else if (_av !== undefined)
     testPassed(_a + " is defined.");
   else
     testFailed(_a + " should be defined. Was " + _av);
 }
 
+function shouldBeGreaterThan(_a, _b) {
+    if (typeof _a != "string" || typeof _b != "string")
+        debug("WARN: shouldBeGreaterThan expects string arguments");
+
+    var _exception;
+    var _av;
+    try {
+        _av = eval(_a);
+    } catch (e) {
+        _exception = e;
+    }
+    var _bv = eval(_b);
+
+    if (_exception)
+        testFailed(_a + " should be > " + _b + ". Threw exception " + _exception);
+    else if (typeof _av == "undefined" || _av <= _bv)
+        testFailed(_a + " should be > " + _b + ". Was " + _av + " (of type " + typeof _av + ").");
+    else
+        testPassed(_a + " is > " + _b);
+}
+
 function shouldBeGreaterThanOrEqual(_a, _b) {
     if (typeof _a != "string" || typeof _b != "string")
         debug("WARN: shouldBeGreaterThanOrEqual expects string arguments");
 
     var _exception;
     var _av;
     try {
         _av = eval(_a);
     } catch (e) {
         _exception = e;
@@ skipping 240 matching lines @@
     testPassed = function(msg) {
         workerPort.postMessage('PASS:' + msg);
     };
     finishJSTest = function() {
         workerPort.postMessage('DONE:');
     };
     debug = function(msg) {
         workerPort.postMessage(msg);
     };
 }