Don't force-update style and layout in Document::scrollingElement

third_party/WebKit/Source/core/dom/Document.h

Index: third_party/WebKit/Source/core/dom/Document.h
diff --git a/third_party/WebKit/Source/core/dom/Document.h b/third_party/WebKit/Source/core/dom/Document.h
index 47df5cc4ba95ff8578e3cfaab36c464463590075..1bf5dc105b681a734c615f4b00ae5c9399bf16da 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -344,6 +344,9 @@ class CORE_EXPORT Document : public ContainerNode,
   HeapVector<Member<Element>> elementsFromPoint(int x, int y) const;
   Range* caretRangeFromPoint(int x, int y);
   Element* scrollingElement();
+  // When calling from C++ code, use this method. scrollingElement() is
+  // just for the web IDL implementation.
+  Element* scrollingElementNoLayout();
 
   void addStyleReattachData(Node&, StyleReattachData&);
   StyleReattachData getStyleReattachData(Node&);