Add 'error' parameter to 'window.onerror' handlers.

LayoutTests/fast/events/resources/onerror-test.js

Index: LayoutTests/fast/events/resources/onerror-test.js
diff --git a/LayoutTests/fast/events/resources/onerror-test.js b/LayoutTests/fast/events/resources/onerror-test.js
index 1016aa201081576947532187954f43b99b8fbb74..50beff3d23d37804c419f25f1c85c15ba639cd07 100644
--- a/LayoutTests/fast/events/resources/onerror-test.js
+++ b/LayoutTests/fast/events/resources/onerror-test.js
@@ -8,8 +8,10 @@ function throwException(message) {
 
 var errorsSeen = 0;
 function dumpOnErrorArgumentValuesAndReturn(returnValue, callback) {
-    window.onerror = function (message, url, line, column) {
+    window.onerror = function (message, url, line, column, error) {
         debug("window.onerror: \"" + message + "\" at " + stripURL(url) + " (Line: " + line + ", Column: " + column + ")");
+        if (error)
+            debug(stripStackURLs(error.stack));
 
         if (callback)
             callback(++errorsSeen);
@@ -44,6 +46,8 @@ var eventPassedToTheErrorListener = null;
 var eventCurrentTarget = null;
 function dumpErrorEvent(e) {
     debug("Handling '" + e.type + "' event (phase " + e.eventPhase + "): \"" + e.message + "\" at " + stripURL(e.filename) + ":" + e.lineno);
+    if (e.error)
+        debug(stripStackURLs(e.error.stack));
 
     eventPassedToTheErrorListener = e;
     eventCurrentTarget = e.currentTarget;
@@ -52,3 +56,13 @@ function dumpErrorEvent(e) {
     eventPassedToTheErrorListener = null;
     eventCurrentTarget = null;
 }
+
+function stripStackURLs(stackTrace) {
+    var text = stackTrace + "\n\n";
+    stackTrace = stackTrace.split("\n");
+    var length = Math.min(stackTrace.length, 100);
+    for (var i = 0; i < length; i++) {
+        text += stackTrace[i].replace(/at ((?:eval at \()?[a-zA-Z\.]+ )?\(?.+\/([^\/]+):(\d+):(\d+)\)?/, "at $1$2:$3:$4") + "\n";
+    }
+    return text;
+}