Extract ResultCatcher from ExtensionApiTest. Use it in ShellApiTest.

extensions/test/data/api_test/dns/api/background.js

Index: extensions/test/data/api_test/dns/api/background.js
diff --git a/chrome/test/data/extensions/api_test/dns/api/background.js b/extensions/test/data/api_test/dns/api/background.js
similarity index 95%
copy from chrome/test/data/extensions/api_test/dns/api/background.js
copy to extensions/test/data/api_test/dns/api/background.js
index 6614579f848d87f408f88cdb5b4580631a42ab4c..b91f4e1578e528ab6430e16cdbc3dd9d45a7e3a6 100644
--- a/chrome/test/data/extensions/api_test/dns/api/background.js
+++ b/extensions/test/data/api_test/dns/api/background.js
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+console.log('background loaded test test DEBUGYOZ');

[James Cook, 2014/09/03 18:08:41]

do you still need this line?

[Yoyo Zhou, 2014/09/04 21:57:42]

No.

+
 var testIPLiteralResolution = function() {
   var callback = function(resolveInfo) {
     chrome.test.assertEq(0, resolveInfo.resultCode);