Support script modify iframe scrolling, marginWidth and marginHeight attr

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 5bc1abbd513505af58c601b72bfe74f6b99df791..bfa3cd15cff1c5c51e9415d79fc7edd00cec7873 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -55,6 +55,7 @@
 #include "core/page/PageVisibilityState.h"
 #include "platform/Length.h"
 #include "platform/Timer.h"
+#include "platform/scroll/ScrollTypes.h"
 #include "platform/weborigin/KURL.h"
 #include "platform/weborigin/ReferrerPolicy.h"
 #include "public/platform/WebFocusType.h"
@@ -823,6 +824,8 @@ class CORE_EXPORT Document : public ContainerNode,
   // this is the top level document or the owner is remote.
   HTMLFrameOwnerElement* localOwner() const;
 
+  void willChangeFrameOwnerProperties(int, int, ScrollbarMode);

[alexmos, 2016/11/21 17:56:56]

nit: might be better to include the arg names here for the two ints, as it's not
obvious what they refer to.

+
   // Returns true if this document belongs to a frame that the parent document
   // made invisible (for instance by setting as style display:none).
   bool isInInvisibleSubframe() const;