Rename Node::treeScope() to Node::treeScopeOrDocument()

third_party/WebKit/Source/core/html/HTMLElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLElement.cpp b/third_party/WebKit/Source/core/html/HTMLElement.cpp
index fd68fa31ba72fa0ed183a71a9b33b27b5f67b11e..109d11ae0a12ef73484586fb6398a6e4c1abb1f1 100644
--- a/third_party/WebKit/Source/core/html/HTMLElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLElement.cpp
@@ -954,7 +954,7 @@ HTMLMenuElement* HTMLElement::contextMenu() const
     if (contextMenuId.isNull())
         return nullptr;
 
-    Element* element = treeScope().getElementById(contextMenuId);
+    Element* element = treeScopeOrDocument().getElementById(contextMenuId);
     // Not checking if the menu element is of type "popup".
     // Ignoring menu element type attribute is intentional according to the standard.
     return isHTMLMenuElement(element) ? toHTMLMenuElement(element) : nullptr;
@@ -975,7 +975,7 @@ void HTMLElement::setContextMenu(HTMLMenuElement* contextMenu)
     // Otherwise, the content attribute must be set to the empty string.
     const AtomicString& contextMenuId(contextMenu->fastGetAttribute(idAttr));
 
-    if (!contextMenuId.isNull() && contextMenu == treeScope().getElementById(contextMenuId))
+    if (!contextMenuId.isNull() && contextMenu == treeScopeOrDocument().getElementById(contextMenuId))
         setAttribute(contextmenuAttr, contextMenuId);
     else
         setAttribute(contextmenuAttr, "");