Replace RenderArena with PartitionAlloc.

Source/WebKit/chromium/tests/RenderTableCellTest.cpp

Index: Source/WebKit/chromium/tests/RenderTableCellTest.cpp
diff --git a/Source/WebKit/chromium/tests/RenderTableCellTest.cpp b/Source/WebKit/chromium/tests/RenderTableCellTest.cpp
index 12af9a7c4bb4be40625b8dbd15f16598a4e78177..e259e4b43a0081e0f6dcca51fc852dd04e0bb6e4 100644
--- a/Source/WebKit/chromium/tests/RenderTableCellTest.cpp
+++ b/Source/WebKit/chromium/tests/RenderTableCellTest.cpp
@@ -33,7 +33,6 @@
 #include "WebView.h"
 #include "core/dom/Document.h"
 #include "core/page/Frame.h"
-#include "core/rendering/RenderArena.h"
 
 #include <gtest/gtest.h>
 
@@ -63,11 +62,6 @@ class RenderTableCellDeathTest : public testing::Test {
         return frame()->document();
     }
 
-    static RenderArena* arena()
-    {
-        return document()->renderArena();
-    }
-
     virtual void SetUp()
     {
         m_cell = RenderTableCell::createAnonymous(document());