Teach V8GCController how to traverse TemplateContentDocumentFragment::host

Source/bindings/v8/V8GCController.cpp

Index: Source/bindings/v8/V8GCController.cpp
diff --git a/Source/bindings/v8/V8GCController.cpp b/Source/bindings/v8/V8GCController.cpp
index 483d6480c733435afe8ee098cce49b29528bc2b1..df5d5eb9c569f892968824b16b1396a1a179eac5 100644
--- a/Source/bindings/v8/V8GCController.cpp
+++ b/Source/bindings/v8/V8GCController.cpp
@@ -42,6 +42,7 @@
 #include "bindings/v8/WrapperTypeInfo.h"
 #include "core/dom/Attr.h"
 #include "core/dom/NodeTraversal.h"
+#include "core/dom/TemplateContentDocumentFragment.h"
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/html/HTMLImageElement.h"
@@ -84,7 +85,7 @@ Node* V8GCController::opaqueRootForGC(Node* node, v8::Isolate*)
         node = ownerElement;
     }
 
-    while (Node* parent = node->parentOrShadowHostNode())
+    while (Node* parent = node->parentOrShadowHostOrTemplateHostNode())
         node = parent;
 
     return node;