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 4ea28a71e472ac90b904ef538954f21f0d609eca..80273895fe8d19c4425e6538a1e7b280d88200a1 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -4310,6 +4310,19 @@ HTMLFrameOwnerElement* Document::localOwner() const {
   return frame()->deprecatedLocalOwner();
 }
 
+void Document::willChangeFrameOwnerProperties(int marginWidth,
+                                              int marginHeight,
+                                              ScrollbarMode scrollingMode) {
+  DCHECK(localOwner());
+
+  if (marginWidth != localOwner()->marginWidth())
+    body()->setIntegralAttribute(marginwidthAttr, marginWidth);
+  if (marginHeight != localOwner()->marginHeight())
+    body()->setIntegralAttribute(marginheightAttr, marginHeight);
+  if (scrollingMode != localOwner()->scrollingMode())
+    view()->setNeedsLayout();
+}
+
 bool Document::isInInvisibleSubframe() const {
   if (!localOwner())
     return false;  // this is a local root element