Remove all calls to domAutomationController.setAutomationId.

chrome/test/data/nacl/load_util.js

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var load_util = {
   report: function(msg) {
-    domAutomationController.setAutomationId(0);
-    // The automation controller seems to choke on Objects, so turn them into
-    // strings.
-    domAutomationController.send(JSON.stringify(msg));
+    domAutomationController.send(msg);
   },
 
   log: function(message) {
     load_util.report({type: "Log", message: message});
   },
 
   shutdown: function(message, passed) {
     load_util.report({type: "Shutdown", message: message, passed: passed});
   },
 
@@ skipping 40 matching lines @@
     embed.addEventListener("error", function(event) {
       if (embed.lastError != "NaCl module load failed: " + message) {
         load_util.log("Unexpected load error: " + embed.lastError);
         load_util.shutdown("1 test failed.", false);
       } else {
         load_util.shutdown("1 test passed.", true);
       }
     }, true);
   }
 };