Merge 157543 "Clear TemplateContentDocumentFragment::m_host when..."

Source/core/html/HTMLTemplateElement.h

Index: Source/core/html/HTMLTemplateElement.h
===================================================================
--- Source/core/html/HTMLTemplateElement.h	(revision 157860)
+++ Source/core/html/HTMLTemplateElement.h	(working copy)
@@ -31,11 +31,13 @@
 #ifndef HTMLTemplateElement_h
 #define HTMLTemplateElement_h
 
-#include "core/dom/DocumentFragment.h"
 #include "core/html/HTMLElement.h"
 
 namespace WebCore {
 
+class DocumentFragment;
+class TemplateContentDocumentFragment;
+
 class HTMLTemplateElement FINAL : public HTMLElement {
 public:
     static PassRefPtr<HTMLTemplateElement> create(const QualifiedName&, Document*);
@@ -49,7 +51,7 @@
 
     HTMLTemplateElement(const QualifiedName&, Document*);
 
-    mutable RefPtr<DocumentFragment> m_content;
+    mutable RefPtr<TemplateContentDocumentFragment> m_content;
 };
 
 const HTMLTemplateElement* toHTMLTemplateElement(const Node*);