Revert of Remove javaEnabled setting.

Source/core/html/HTMLAppletElement.cpp

Index: Source/core/html/HTMLAppletElement.cpp
diff --git a/Source/core/html/HTMLAppletElement.cpp b/Source/core/html/HTMLAppletElement.cpp
index 7d63cb481e1399544cc7281ab0f3b4d452369053..af9de0c88e87fca22ffd82d0d6118bbd4bc7fb16 100644
--- a/Source/core/html/HTMLAppletElement.cpp
+++ b/Source/core/html/HTMLAppletElement.cpp
@@ -92,12 +92,20 @@
 
 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
@@ -201,6 +209,21 @@
     }
 }
 
+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)) {