Revert of Detach old frame on WebFrame::swap.

Source/web/tests/FrameTestHelpers.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 275 matching lines @@
 {
 }
 
 WebFrame* TestWebFrameClient::createChildFrame(WebLocalFrame* parent, WebTreeScopeType scope, const WebString& frameName, WebSandboxFlags sandboxFlags)
 {
     WebFrame* frame = WebLocalFrame::create(scope, this);
     parent->appendChild(frame);
     return frame;
 }
 
-void TestWebFrameClient::frameDetached(WebFrame* frame, DetachType type)
+void TestWebFrameClient::frameDetached(WebFrame* frame)
 {
-    if (type == DetachType::Remove && frame->parent())
+    if (frame->parent())
         frame->parent()->removeChild(frame);
     frame->close();
 }
 
 void TestWebFrameClient::didStartLoading(bool)
 {
     ++m_loadsInProgress;
 }
 
 void TestWebFrameClient::didStopLoading()
@@ skipping 15 matching lines @@
 
         Platform::current()->yieldCurrentThread();
     }
 }
 
 TestWebRemoteFrameClient::TestWebRemoteFrameClient()
     : m_frame(WebRemoteFrame::create(WebTreeScopeType::Document, this))
 {
 }
 
-void TestWebRemoteFrameClient::frameDetached(DetachType type)
+void TestWebRemoteFrameClient::frameDetached()
 {
-    if (type == DetachType::Remove && m_frame->parent())
+    if (m_frame->parent())
         m_frame->parent()->removeChild(m_frame);
     m_frame->close();
 }
 
 void TestWebViewClient::initializeLayerTreeView()
 {
     m_layerTreeView = adoptPtr(Platform::current()->unitTestSupport()->createLayerTreeViewForTesting());
     ASSERT(m_layerTreeView);
 }
 
 } // namespace FrameTestHelpers
 } // namespace blink