First pass at experimental omnibox API. There are plenty of rough edges and

chrome/renderer/resources/extension_apitest.js

 // extension_apitest.js
 // mini-framework for ExtensionApiTest browser tests
 
 var chrome = chrome || {};
 (function() {
   chrome.test = chrome.test || {};
 
   chrome.test.tests = chrome.test.tests || [];
 
   var completed = false;
   var currentTest = null;
   var lastTest = null;
 
   function complete() {
     completed = true;
 
     // Try to get the script to stop running immediately.
     // This isn't an error, just an attempt at saying "done".
     throw "completed";
   }
 
   // Helper function to get around the fact that function names in javascript
   // are read-only, and you can't assign one to anonymous functions.
   function testName(test) {
-    return test.name || test.generatedName;
+    return test ? (test.name || test.generatedName) : "(no test)";
   }
 
   chrome.test.fail = function(message) {
     if (completed) throw "completed";
     chrome.test.log("(  FAILED  ) " + testName(currentTest));
 
     var stack = "(no stack available)";
     try {
       crash.me += 0;  // An intentional exception to get the stack trace.
     } catch (e) {
@@ skipping 168 matching lines @@
 
   chrome.test.callbackFail = function(expectedError) {
     return chrome.test.callback(null, expectedError);
   };
 
   chrome.test.runTests = function(tests) {
     chrome.test.tests = tests;
     chrome.test.runNextTest();
   };
 })();