Add chrome.runtime.getPackageDirectoryEntry.

chrome/test/data/extensions/api_test/runtime/get_package_directory/app/test.js

Index: chrome/test/data/extensions/api_test/runtime/get_package_directory/app/test.js
diff --git a/chrome/test/data/extensions/api_test/runtime/get_package_directory/app/test.js b/chrome/test/data/extensions/api_test/runtime/get_package_directory/app/test.js
new file mode 100644
index 0000000000000000000000000000000000000000..70c86c006363b93fc08cf3de81621c0568c405c7
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/runtime/get_package_directory/app/test.js
@@ -0,0 +1,39 @@
+// Copyright 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.
+
+expectedDirectoryEntries = [
+  'background.js',
+  'manifest.json',
+  'test.html',
+  'test.js'
+];
+
+chrome.test.runTests([
+  function getPackageDirectoryEntry() {
+    chrome.runtime.getPackageDirectoryEntry(chrome.test.callbackPass(
+        function(directoryEntry) {
+      var directoryReader = directoryEntry.createReader();
+      var directoryContents = [];

[benwells, 2013/06/11 03:14:51]

This test is quite strange. Why do you call readEntries twice on the same
directory reader?

Also it would be good to test that files in subfolders of the crx folder can be
seen.

[Sam McNally, 2013/06/11 06:00:29]

readEntries might not return all entries in a single call and should be called
until it returns an empty array.
Done.

+      directoryReader.readEntries(chrome.test.callbackPass(
+          function readEntriesCallback(entries) {
+        if (entries.length == 0) {
+          directoryContents.sort();
+          chrome.test.assertEq(expectedDirectoryEntries, directoryContents);
+        } else {
+          for (var i = 0; i < entries.length; i++) {
+            directoryContents.push(entries[i].name);
+            chrome.fileSystem.isWritableEntry(
+                entries[i], chrome.test.callbackPass(function(isWritable) {
+              chrome.test.assertFalse(isWritable);
+            }));
+            chrome.fileSystem.getWritableEntry(
+                entries[i], chrome.test.callbackFail(
+                    'Cannot write to file in a restricted location'));
+          }
+          directoryReader.readEntries(readEntriesCallback);
+        }
+      }));
+    }));
+  }
+]);