Replace RenderArena with PartitionAlloc.

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 d1ac02ca7f994c47caf28f3acab6b623bf71fc00..e5eb329012ca313683f124e8d911f39379c79287 100644
--- a/Source/core/html/HTMLAppletElement.cpp
+++ b/Source/core/html/HTMLAppletElement.cpp
@@ -72,12 +72,12 @@ bool HTMLAppletElement::rendererIsNeeded(const NodeRenderingContext& context)
     return HTMLPlugInImageElement::rendererIsNeeded(context);
 }
 
-RenderObject* HTMLAppletElement::createRenderer(RenderArena*, RenderStyle* style)
+RenderObject* HTMLAppletElement::createRenderer(RenderStyle* style)
 {
     if (!canEmbedJava())
         return RenderObject::createObject(this, style);
 
-    return new (document()->renderArena()) RenderApplet(this);
+    return new RenderApplet(this);
 }
 
 RenderWidget* HTMLAppletElement::renderWidgetForJSBindings() const