Revert of Remove javaEnabled setting.

Source/core/html/HTMLAppletElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006, 2008, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 74 matching lines @@
 
 bool HTMLAppletElement::layoutObjectIsNeeded(const ComputedStyle& style)
 {
     if (!fastHasAttribute(codeAttr) && !openShadowRoot())
         return false;
     return HTMLPlugInElement::layoutObjectIsNeeded(style);
 }
 
 LayoutObject* HTMLAppletElement::createLayoutObject(const ComputedStyle& style)
 {
-    return LayoutObject::createObject(this, style);
+    if (!canEmbedJava() || openShadowRoot())
+        return LayoutObject::createObject(this, style);
+
+    if (usePlaceholderContent())
+        return new LayoutBlockFlow(this);
+
+    return new LayoutApplet(this);
 }
 
 LayoutPart* HTMLAppletElement::layoutPartForJSBindings() const
 {
-    return nullptr;
+    if (!canEmbedJava())
+        return nullptr;
+    return HTMLPlugInElement::layoutPartForJSBindings();
 }
 
 LayoutPart* HTMLAppletElement::existingLayoutPart() const
 {
     return layoutPart();
 }
 
 void HTMLAppletElement::updateWidgetInternal()
 {
     setNeedsWidgetUpdate(false);
@@ skipping 83 matching lines @@
         setPlaceholder(nullptr);
     } else if (placeholder) {
         setPlaceholder(placeholder.release());
     } else if (widget) {
         document().setContainsPlugins();
         setWidget(widget);
         setPlaceholder(nullptr);
     }
 }
 
+bool HTMLAppletElement::canEmbedJava() const
+{
+    if (document().isSandboxed(SandboxPlugins))
+        return false;
+
+    Settings* settings = document().settings();
+    if (!settings)
+        return false;
+
+    if (!settings->javaEnabled())
+        return false;
+
+    return true;
+}
+
 bool HTMLAppletElement::canEmbedURL(const KURL& url) const
 {
     if (!document().securityOrigin()->canDisplay(url)) {
         FrameLoader::reportLocalLoadFailed(document().frame(), url.string());
         return false;
     }
 
     if (!document().contentSecurityPolicy()->allowObjectFromSource(url)
         || !document().contentSecurityPolicy()->allowPluginTypeForDocument(document(), m_serviceType, m_serviceType, url)) {
         layoutEmbeddedObject()->setPluginUnavailabilityReason(LayoutEmbeddedObject::PluginBlockedByContentSecurityPolicy);
         return false;
     }
     return true;
 }
 
 }