Replace RenderArena with PartitionAlloc.

Source/core/dom/NodeRenderingContext.cpp

Index: Source/core/dom/NodeRenderingContext.cpp
diff --git a/Source/core/dom/NodeRenderingContext.cpp b/Source/core/dom/NodeRenderingContext.cpp
index 856fc6ff53dc69da61f14f40f79b5a586de4b45f..449bd9bfc79c0891003c5d91c362da417c97ad15 100644
--- a/Source/core/dom/NodeRenderingContext.cpp
+++ b/Source/core/dom/NodeRenderingContext.cpp
@@ -258,7 +258,7 @@ void NodeRenderingContext::createRendererForElementIfNeeded()
     RenderObject* nextRenderer = this->nextRenderer();
 
     Document* document = element->document();
-    RenderObject* newRenderer = element->createRenderer(document->renderArena(), m_style.get());
+    RenderObject* newRenderer = element->createRenderer(m_style.get());
     if (!newRenderer)
         return;
 
@@ -304,7 +304,7 @@ void NodeRenderingContext::createRendererForTextIfNeeded()
 
     if (!textNode->textRendererIsNeeded(*this))
         return;
-    RenderText* newRenderer = textNode->createTextRenderer(document->renderArena(), m_style.get());
+    RenderText* newRenderer = textNode->createTextRenderer(m_style.get());
     if (!newRenderer)
         return;
     if (!parentRenderer->isChildAllowed(newRenderer, m_style.get())) {