Replace RenderArena with PartitionAlloc.

Source/core/rendering/RenderText.cpp

Index: Source/core/rendering/RenderText.cpp
diff --git a/Source/core/rendering/RenderText.cpp b/Source/core/rendering/RenderText.cpp
index 13d84d9aa8aa899b96369c50f4357126d6e4361e..a421527d9a585ff4533d7f63461591f4f843f47e 100644
--- a/Source/core/rendering/RenderText.cpp
+++ b/Source/core/rendering/RenderText.cpp
@@ -298,11 +298,10 @@ void RenderText::removeTextBox(InlineTextBox* box)
 void RenderText::deleteTextBoxes()
 {
     if (firstTextBox()) {
-        RenderArena* arena = renderArena();
         InlineTextBox* next;
         for (InlineTextBox* curr = firstTextBox(); curr; curr = next) {
             next = curr->nextTextBox();
-            curr->destroy(arena);
+            curr->destroy();
         }
         m_firstTextBox = m_lastTextBox = 0;
     }
@@ -1486,7 +1485,7 @@ void RenderText::dirtyLineBoxes(bool fullLayout)
 
 InlineTextBox* RenderText::createTextBox()
 {
-    return new (renderArena()) InlineTextBox(this);
+    return new InlineTextBox(this);
 }
 
 InlineTextBox* RenderText::createInlineTextBox()
@@ -1519,7 +1518,7 @@ void RenderText::positionLineBox(InlineBox* box)
             m_lastTextBox = s->prevTextBox();
         else
             s->nextTextBox()->setPreviousTextBox(s->prevTextBox());
-        s->destroy(renderArena());
+        s->destroy();
         return;
     }