Prettify output from chrome.fileSystem.getDisplayPath for Windows profile directory

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

Index: chrome/test/data/extensions/api_test/file_system/get_display_path_prettify/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/test.js
similarity index 66%
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/test.js
index 292ed7ecea0b7a27637b6fd79cf9c338c8b9e401..1cf19a154e68debe4c2f29e6f96e0fd173d89421 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/test.js
@@ -6,10 +6,13 @@ 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.
+
+      // Test that we can get the display path of the file, and that it begins
+      // with the home directory indicator (currently "~").
       chrome.fileSystem.getDisplayPath(entry, chrome.test.callbackPass(
           function(path) {
-        chrome.test.assertTrue(path.indexOf("file_system") >= 0);
+        chrome.test.assertTrue(path.indexOf("~/") == 0 ||  // POSIX
+                               path.indexOf("~\\") == 0);  // Windows
         chrome.test.assertTrue(path.indexOf("gold.txt") >= 0);
       }));
     }));