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

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

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_APPS_APP_INFO_DIALOG_APP_INFO_DIALOG_VIEWS_H_
 #define CHROME_BROWSER_UI_VIEWS_APPS_APP_INFO_DIALOG_APP_INFO_DIALOG_VIEWS_H_
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "extensions/browser/extension_registry_observer.h"
@@ skipping 19 matching lines @@
                       public extensions::ExtensionRegistryObserver {
  public:
   AppInfoDialog(gfx::NativeWindow parent_window,
                 Profile* profile,
                 const extensions::Extension* app);
   ~AppInfoDialog() override;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(AppInfoDialogAshTest,
                            PinButtonsAreFocusedAfterPinUnpin);
+  FRIEND_TEST_ALL_PREFIXES(AppInfoDialogViewsTest, ArcAppInfoLinks);
 
   // Closes the dialog.
   void Close();
 
   void StartObservingExtensionRegistry();
   void StopObservingExtensionRegistry();
 
   // Overridden from extensions::ExtensionRegistryObserver:
   void OnExtensionUninstalled(content::BrowserContext* browser_context,
                               const extensions::Extension* extension,
                               extensions::UninstallReason reason) override;
   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);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_APPS_APP_INFO_DIALOG_APP_INFO_DIALOG_VIEWS_H_