Chrome extension to get console messages upon test failures. Unlike the

pkg/unittest/test_controller.js

Index: pkg/unittest/test_controller.js
===================================================================
--- pkg/unittest/test_controller.js	(revision 13424)
+++ pkg/unittest/test_controller.js	(working copy)
@@ -17,8 +17,30 @@
 
 var waitForDone = false;
 
+// _callback and getMessages are used to retrieve console messages
+// from the Chrome ConsoleCollector extension. run_selenium.py can
+// call getMessages with execute_async_script, and when the messages
+// are returned from the extension they can be returned via a callback
+// provided by Selenium. _callback is used to hold a reference to 
+// that callback. The messages are returned from the extension via
+// a window.postMessage call with type property 'gotMessages'.
+var _callback;
+function getMessages(callback) {
+  _callback = callback;
+  window.postMessage("getMessages", "*");
+}
+
 function processMessage(msg) {
-  if (typeof msg != 'string') return;
+  if (typeof msg != 'string') {
+    if (msg.type == 'gotMessages') {
+      // Handle console messages from Chrome extension.
+      if (_callback) {
+        _callback(msg.messages);
+        _callback = null;
+      }
+    }
+    return;
+  }
   if (msg == 'unittest-suite-done') {
     if (testRunner) testRunner.notifyDone();
   } else if (msg == 'unittest-suite-wait-for-done') {