Have DOMPatchSupport and DocumentFragment deal with Document references

Source/core/html/track/TextTrackCue.cpp

Index: Source/core/html/track/TextTrackCue.cpp
diff --git a/Source/core/html/track/TextTrackCue.cpp b/Source/core/html/track/TextTrackCue.cpp
index 6648b225d356206781ac4d5836f6514693ef04a9..167f03209d0f0dcf031bef1ba3174be2cc567f2c 100644
--- a/Source/core/html/track/TextTrackCue.cpp
+++ b/Source/core/html/track/TextTrackCue.cpp
@@ -516,7 +516,7 @@ void TextTrackCue::copyWebVTTNodeToDOMTree(ContainerNode* webVTTNode, ContainerN
 PassRefPtr<DocumentFragment> TextTrackCue::getCueAsHTML()
 {
     createWebVTTNodeTree();
-    RefPtr<DocumentFragment> clonedFragment = DocumentFragment::create(ownerDocument());
+    RefPtr<DocumentFragment> clonedFragment = DocumentFragment::create(*ownerDocument());
     copyWebVTTNodeToDOMTree(m_webVTTNodeTree.get(), clonedFragment.get());
     return clonedFragment.release();
 }
@@ -525,7 +525,7 @@ PassRefPtr<DocumentFragment> TextTrackCue::createCueRenderingTree()
 {
     RefPtr<DocumentFragment> clonedFragment;
     createWebVTTNodeTree();
-    clonedFragment = DocumentFragment::create(ownerDocument());
+    clonedFragment = DocumentFragment::create(*ownerDocument());
     m_webVTTNodeTree->cloneChildNodes(clonedFragment.get());
     return clonedFragment.release();
 }