Have CharacterData constructor take a Document reference in argument

Source/core/dom/CharacterData.h

Index: Source/core/dom/CharacterData.h
diff --git a/Source/core/dom/CharacterData.h b/Source/core/dom/CharacterData.h
index d35623c417f6332f85b46a48e7570c674a418f43..e783803ecbb5b558276fb2933793500dfbaff712 100644
--- a/Source/core/dom/CharacterData.h
+++ b/Source/core/dom/CharacterData.h
@@ -51,8 +51,8 @@ public:
     unsigned parserAppendData(const String& string, unsigned offset, unsigned lengthLimit);
 
 protected:
-    CharacterData(TreeScope* treeScope, const String& text, ConstructionType type)
-        : Node(treeScope, type)
+    CharacterData(TreeScope& treeScope, const String& text, ConstructionType type)
+        : Node(&treeScope, type)
         , m_data(!text.isNull() ? text : emptyString())
     {
         ASSERT(type == CreateOther || type == CreateText || type == CreateEditingText);