Enable resize and layout for frames with RemoteFrame ancestors

Source/core/frame/Frame.cpp

Index: Source/core/frame/Frame.cpp
diff --git a/Source/core/frame/Frame.cpp b/Source/core/frame/Frame.cpp
index 16472d4bc65112bc8467e4d9f22f6cf0ca23ae03..4af97072c6393b341a793032660826eba5bdfd09 100644
--- a/Source/core/frame/Frame.cpp
+++ b/Source/core/frame/Frame.cpp
@@ -199,6 +199,17 @@ bool Frame::isMainFrame() const
     return page && this == page->mainFrame();
 }
 
+bool Frame::isLocalRoot() const
+{
+    if (isRemoteFrame())
+        return false;
+
+    if (!tree().parent())
+        return true;
+
+    return tree().parent()->isRemoteFrame();
+}
+
 void Frame::disconnectOwnerElement()
 {
     if (m_owner) {