arc: Fix crash on accessing app info for secondary user.

chrome/browser/ui/views/apps/app_info_dialog/app_info_dialog_views.h

Index: chrome/browser/ui/views/apps/app_info_dialog/app_info_dialog_views.h
diff --git a/chrome/browser/ui/views/apps/app_info_dialog/app_info_dialog_views.h b/chrome/browser/ui/views/apps/app_info_dialog/app_info_dialog_views.h
index add262f22dec0e86d2c641a45c908807c5b45338..2f412d89fc20ee74013649ea9cfefc699178bdf2 100644
--- a/chrome/browser/ui/views/apps/app_info_dialog/app_info_dialog_views.h
+++ b/chrome/browser/ui/views/apps/app_info_dialog/app_info_dialog_views.h
@@ -37,6 +37,7 @@ class AppInfoDialog : public views::View,
  private:
   FRIEND_TEST_ALL_PREFIXES(AppInfoDialogAshTest,
                            PinButtonsAreFocusedAfterPinUnpin);
+  FRIEND_TEST_ALL_PREFIXES(AppInfoDialogViewsTest, ArcAppInfoLinks);
 
   // Closes the dialog.
   void Close();
@@ -51,13 +52,14 @@ class AppInfoDialog : public views::View,
   void OnShutdown(extensions::ExtensionRegistry* registry) override;
 
   // UI elements of the dialog.
-  views::View* dialog_header_;
-  views::ScrollView* dialog_body_;
-  views::View* dialog_footer_;
+  views::View* dialog_header_ = nullptr;
+  views::ScrollView* dialog_body_ = nullptr;
+  views::View* dialog_footer_ = nullptr;
+  views::View* arc_app_info_links_ = nullptr;
 
   Profile* profile_;
   std::string app_id_;
-  extensions::ExtensionRegistry* extension_registry_;
+  extensions::ExtensionRegistry* extension_registry_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(AppInfoDialog);
 };