Add a test for checking that refreshing a page does load the same WebUI page.

chrome/test/data/webui/test_api.js

Index: chrome/test/data/webui/test_api.js
===================================================================
--- chrome/test/data/webui/test_api.js	(revision 82016)
+++ chrome/test/data/webui/test_api.js	(working copy)
@@ -39,12 +39,11 @@
 
   function assertEquals(expected, actual, message) {
     if (expected !== actual) {
-      throw new Error('Test Error in ' + testName(currentTest) +
-                      '\nActual: ' + actual + '\nExpected: ' + expected +
-                      '\n' + message);
+      throw new Error('Test Error. Actual: ' + actual + '\nExpected: ' +
+                       expected + '\n' + message);
     }
     if (typeof expected != typeof actual) {
-      throw new Error('Test Error in ' + testName(currentTest) +
+      throw new Error('Test Error' +
                       ' (type mismatch)\nActual Type: ' + typeof actual +
                       '\nExpected Type:' + typeof expected + '\n' + message);
     }
@@ -59,7 +58,7 @@
       console.log('Running test ' + currentTest.name);
       currentTest.call();
     } catch (e) {
-      console.error(
+      console.log(
           'Failed: ' + currentTest.name + '\nwith exception: ' + e.message);
 
       fail(e.message);