Detach old frame on WebFrame::swap.

Source/core/frame/RemoteFrame.cpp

Index: Source/core/frame/RemoteFrame.cpp
diff --git a/Source/core/frame/RemoteFrame.cpp b/Source/core/frame/RemoteFrame.cpp
index 3ae90324d8aa8ddb2612311a82427c0980bf17b4..c6e694589b32f73c4183d0b988cc5aad07b6af35 100644
--- a/Source/core/frame/RemoteFrame.cpp
+++ b/Source/core/frame/RemoteFrame.cpp
@@ -74,7 +74,7 @@ void RemoteFrame::reload(ReloadPolicy reloadPolicy, ClientRedirectPolicy clientR
     remoteFrameClient()->reload(reloadPolicy, clientRedirectPolicy);
 }
 
-void RemoteFrame::detach()
+void RemoteFrame::detach(FrameDetachType type)
 {
     // Frame::detach() requires the caller to keep a reference to this, since
     // otherwise it may clear the last reference to this, causing it to be
@@ -86,7 +86,7 @@ void RemoteFrame::detach()
     client()->willBeDetached();
     m_windowProxyManager->clearForClose();
     setView(nullptr);
-    Frame::detach();
+    Frame::detach(type);
 }
 
 RemoteSecurityContext* RemoteFrame::securityContext() const