Prettify Mac names, rewrite getDisplayPath API call to focus on $HOME

chrome/test/data/extensions/api_test/file_system/get_display_path_prettify_mac/test.js

Index: chrome/test/data/extensions/api_test/file_system/get_display_path_prettify_mac/test.js
diff --git a/chrome/test/data/extensions/api_test/file_system/get_display_path/test.js b/chrome/test/data/extensions/api_test/file_system/get_display_path_prettify_mac/test.js
similarity index 59%
copy from chrome/test/data/extensions/api_test/file_system/get_display_path/test.js
copy to chrome/test/data/extensions/api_test/file_system/get_display_path_prettify_mac/test.js
index 292ed7ecea0b7a27637b6fd79cf9c338c8b9e401..301d1a4b3fecd2799b41dfa9f134ddc251ddbf3e 100644
--- a/chrome/test/data/extensions/api_test/file_system/get_display_path/test.js
+++ b/chrome/test/data/extensions/api_test/file_system/get_display_path_prettify_mac/test.js
@@ -1,3 +1,4 @@
+
 // Copyright (c) 2012 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.
@@ -6,11 +7,15 @@ chrome.test.runTests([
   function getDisplayPath() {
     chrome.fileSystem.chooseFile(chrome.test.callbackPass(function(entry) {
       chrome.test.assertEq('gold.txt', entry.name);
-      // Test that we can get the display path of the file.
+
+      // The on-disk path of this file ends with '/test.localized/gold.txt', so
+      // check that getDisplayPath correctly localizes the path by stripping
+      // the '.localized' suffix.
       chrome.fileSystem.getDisplayPath(entry, chrome.test.callbackPass(
           function(path) {
-        chrome.test.assertTrue(path.indexOf("file_system") >= 0);
-        chrome.test.assertTrue(path.indexOf("gold.txt") >= 0);
+        var suffix = '/test/gold.txt';
+        chrome.test.assertEq(suffix,
+            path.substring(path.length - suffix.length));
       }));
     }));
   }