end-to-end extension API tests

chrome/common/extensions/api/extension_api.json

 [
   {
     "namespace": "extension",
     "types": [
       {
         "id": "Port",
         "type": "object",
         "description": "An object which allows two way communication with other pages.",
         "properties": {
           "name": {"type": "string"},
@@ skipping 831 matching lines @@
         "name": "collapse",
         "type": "function",
         "description": "",
         "parameters": [
           {"type": "string", "name": "url", "optional": true},
           {"type": "function", "name": "callback", "optional": true, "parameters": []}
         ]
       }
     ],
     "events": []
+  },
+  {
+    "namespace": "test",
+    "types": [],
+    "functions": [
+      {
+        "name": "fail",
+        "type": "function",
+        "description": "Notify the browser process that test code running in the extension failed.  This is only used for internal unit testing.",
+        "parameters": [
+          {"type": "string", "name": "message"}
+        ]
+      },
+      {
+        "name": "pass",
+        "type": "function",
+        "description": "Notify the browser process that test code running in the extension passed.  This is only used for internal unit testing.",
+        "parameters": []
+      }
+    ],
+    "events": []
   }
 ]