Support script modify iframe scrolling, marginWidth and marginHeight attr

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

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index c44b227186644837c5a4a628e8e496940d1075d4..3ff2914920492d893e77e9502ec6b5d9488d0ba6 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -4404,6 +4404,20 @@ HTMLFrameOwnerElement* Document::localOwner() const {
   return frame()->deprecatedLocalOwner();
 }
 
+void Document::willChangeFrameOwnerProperties(int marginWidth,
+                                              int marginHeight,
+                                              ScrollbarMode scrollingMode) {
+  DCHECK(frame() && frame()->owner());
+  FrameOwner* owner = frame()->owner();
+
+  if (marginWidth != owner->marginWidth())
+    body()->setIntegralAttribute(marginwidthAttr, marginWidth);
+  if (marginHeight != owner->marginHeight())
+    body()->setIntegralAttribute(marginheightAttr, marginHeight);
+  if (scrollingMode != owner->scrollingMode())
+    view()->setNeedsLayout();
+}
+
 bool Document::isInInvisibleSubframe() const {
   if (!localOwner())
     return false;  // this is a local root element