Added a private chromeAuthPrivate API.

chrome/test/data/extensions/api_test/chrome_auth_private/installed_app/cloud_print_exception.js

Index: chrome/test/data/extensions/api_test/chrome_auth_private/installed_app/cloud_print_exception.js
diff --git a/chrome/test/data/extensions/api_test/chrome_auth_private/installed_app/cloud_print_exception.js b/chrome/test/data/extensions/api_test/chrome_auth_private/installed_app/cloud_print_exception.js
new file mode 100644
index 0000000000000000000000000000000000000000..56aef5b269cf2120d99b0a136cee2a5e638c92f2
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/chrome_auth_private/installed_app/cloud_print_exception.js
@@ -0,0 +1,28 @@
+// Copyright (c) 2011 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.
+
+// This test is invoked from a non-component app. So this call should throw an
+// exception when we try and access the chromeAuthPrivate API.
+var tests = [
+  function exceptionSetCreds() {
+    var expectedException =
+        "Error: You do not have permission to use " +
+        "'chromeAuthPrivate.setCloudPrintCredentials'. Be sure to declare in " +
+        "your manifest what permissions you need.";
+    var userEmail = 'foo@gmail.com';
+    var robotEmail = 'foorobot@googleusercontent.com';
+    var credentials = '1/23546efa54';
+    try {
+      chrome.chromeAuthPrivate.setCloudPrintCredentials(
+          userEmail, robotEmail, credentials);
+    } catch (err) {
+      chrome.test.assertEq(expectedException, err.toString());
+      chrome.test.succeed();
+      return;
+    }
+    chrome.test.fail();
+  }
+];
+
+chrome.test.runTests(tests);