Add user data dir field to Mac platform apps

chrome/browser/web_applications/web_app_mac_unittest.mm

Index: chrome/browser/web_applications/web_app_mac_unittest.mm
diff --git a/chrome/browser/web_applications/web_app_mac_unittest.mm b/chrome/browser/web_applications/web_app_mac_unittest.mm
index 6c2a35031c06d6e91696a4bf8c79a49f1bcd8514..a9b3b49ef4551bfce4bb8d38ce44da0d765528ea 100644
--- a/chrome/browser/web_applications/web_app_mac_unittest.mm
+++ b/chrome/browser/web_applications/web_app_mac_unittest.mm
@@ -30,8 +30,9 @@ class WebAppShortcutCreatorMock : public web_app::WebAppShortcutCreator {
  public:
   explicit WebAppShortcutCreatorMock(
       const ShellIntegration::ShortcutInfo& shortcut_info)
-      : WebAppShortcutCreator(shortcut_info,
-        UTF8ToUTF16("fake.cfbundleidentifier")) {
+      : WebAppShortcutCreator(FilePath(),
+                              shortcut_info,
+                              UTF8ToUTF16("fake.cfbundleidentifier")) {
   }
 
   MOCK_CONST_METHOD1(GetDestinationPath, FilePath(const FilePath&));
@@ -100,7 +101,7 @@ TEST(WebAppShortcutCreatorTest, UpdateIcon) {
   ShellIntegration::ShortcutInfo info = GetShortcutInfo();
   info.favicon = *ui::ResourceBundle::GetSharedInstance().GetImageNamed(
       IDR_PRODUCT_LOGO_32).ToSkBitmap();
-  web_app::WebAppShortcutCreator shortcut_creator(info, string16());
+  WebAppShortcutCreatorMock shortcut_creator(info);
 
   shortcut_creator.UpdateIcon(dst_path);
   FilePath icon_path =