Have DOMPatchSupport and DocumentFragment deal with Document references

Source/core/dom/TemplateContentDocumentFragment.h

Index: Source/core/dom/TemplateContentDocumentFragment.h
diff --git a/Source/core/dom/TemplateContentDocumentFragment.h b/Source/core/dom/TemplateContentDocumentFragment.h
index 6ede6f3975245bc29515d696757df4fb482f0e0c..b2023d0d1255e71fb814856ac4a283f11b02fbdc 100644
--- a/Source/core/dom/TemplateContentDocumentFragment.h
+++ b/Source/core/dom/TemplateContentDocumentFragment.h
@@ -33,7 +33,7 @@ namespace WebCore {
 
 class TemplateContentDocumentFragment FINAL : public DocumentFragment {
 public:
-    static PassRefPtr<TemplateContentDocumentFragment> create(Document* document, const Element* host)
+    static PassRefPtr<TemplateContentDocumentFragment> create(Document& document, const Element* host)
     {
         return adoptRef(new TemplateContentDocumentFragment(document, host));
     }
@@ -41,8 +41,8 @@ public:
     const Element* host() const { return m_host; }
 
 private:
-    TemplateContentDocumentFragment(Document* document, const Element* host)
-        : DocumentFragment(document, CreateDocumentFragment)
+    TemplateContentDocumentFragment(Document& document, const Element* host)
+        : DocumentFragment(&document, CreateDocumentFragment)
         , m_host(host)
     {
     }