Replace RenderArena with PartitionAlloc.

Source/core/Init.cpp

Index: Source/core/Init.cpp
diff --git a/Source/core/Init.cpp b/Source/core/Init.cpp
index 3b6fd1dc0a157314ab1097c9f51033ea79548b41..fff12ce2e31de7435a3d17537c5cd57653fd9d01 100644
--- a/Source/core/Init.cpp
+++ b/Source/core/Init.cpp
@@ -39,7 +39,7 @@
 #include "XMLNSNames.h"
 #include "XMLNames.h"
 #include "core/css/MediaFeatureNames.h"
-#include "core/dom/Node.h"
+#include "core/platform/Partitions.h"
 #include "wtf/text/StringStatics.h"
 
 namespace WebCore {
@@ -62,12 +62,12 @@ void init()
     MediaFeatureNames::init();
     WTF::StringStatics::init();
     QualifiedName::init();
-    Node::init();
+    Partitions::init();
 }
 
 void shutdown()
 {
-    Node::shutdown();
+    Partitions::shutdown();
 }
 
 } // namespace WebCore