Convert //extensions/browser from scoped_ptr to std::unique_ptr

extensions/browser/guest_view/app_view/app_view_guest.h

Index: extensions/browser/guest_view/app_view/app_view_guest.h
diff --git a/extensions/browser/guest_view/app_view/app_view_guest.h b/extensions/browser/guest_view/app_view/app_view_guest.h
index 20bfdd166dab9ca8f658f670d912c4c301107635..d1e44dccff3bc70a841789203d78220a430c1d58 100644
--- a/extensions/browser/guest_view/app_view/app_view_guest.h
+++ b/extensions/browser/guest_view/app_view/app_view_guest.h
@@ -72,14 +72,14 @@ class AppViewGuest : public guest_view::GuestView<AppViewGuest> {
                                  const Extension* guest_extension,
                                  const WebContentsCreatedCallback& callback);
 
-  void LaunchAppAndFireEvent(scoped_ptr<base::DictionaryValue> data,
+  void LaunchAppAndFireEvent(std::unique_ptr<base::DictionaryValue> data,
                              const WebContentsCreatedCallback& callback,
                              ExtensionHost* extension_host);
 
   GURL url_;
   std::string guest_extension_id_;
-  scoped_ptr<AppViewGuestDelegate> app_view_guest_delegate_;
-  scoped_ptr<AppDelegate> app_delegate_;
+  std::unique_ptr<AppViewGuestDelegate> app_view_guest_delegate_;
+  std::unique_ptr<AppDelegate> app_delegate_;
 
   // This is used to ensure pending tasks will not fire after this object is
   // destroyed.