[gnome-shell] cleanup: Don't assume hasOwnProperty() method on objects

[Florian Müllner <fmuellner src gnome org>]

commit 0ee7f02f8ec15280fbb699bb22cac481dee25e96
Author: Florian Müllner <fmuellner gnome org>
Date:   Sun Jun 30 01:05:27 2019 +0200

    cleanup: Don't assume hasOwnProperty() method on objects
    
    Since ES5, it is possible to create objects with no prototype at all:
    
        let foo = Object.create(null);
    
    Those object won't have any builtin properties like hasOwnProperty(),
    which is why eslint added a corresponding rule to its default rule set.
    
    While this isn't an issue that affects our code, there's no harm in fol-
    lowing the recommendation and call the method through Object.prototype.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/716

 js/ui/layout.js      | 2 +-
 js/ui/sessionMode.js | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/layout.js b/js/ui/layout.js
index 85bbd24c22..bfe19bfcb5 100644
--- a/js/ui/layout.js
+++ b/js/ui/layout.js
@@ -861,7 +861,7 @@ var LayoutManager = GObject.registerClass({
         // We can't use Params.parse here because we want to drop
         // the extra values like ancestorData.actor
         for (let prop in defaultParams) {
-            if (!params.hasOwnProperty(prop))
+            if (!Object.prototype.hasOwnProperty.call(params, prop))
                 params[prop] = ancestorData[prop];
         }
 
diff --git a/js/ui/sessionMode.js b/js/ui/sessionMode.js
index 583780111a..55a422f3d5 100644
--- a/js/ui/sessionMode.js
+++ b/js/ui/sessionMode.js
@@ -111,7 +111,7 @@ function _loadMode(file, info) {
     let suffix = name.indexOf('.json');
     let modeName = suffix == -1 ? name : name.slice(name, suffix);
 
-    if (_modes.hasOwnProperty(modeName))
+    if (Object.prototype.hasOwnProperty.call(_modes, modeName))
         return;
 
     let fileContent, success_, newMode;