Revert of Detach old frame on WebFrame::swap.

Source/web/tests/FrameTestHelpers.cpp

Index: Source/web/tests/FrameTestHelpers.cpp
diff --git a/Source/web/tests/FrameTestHelpers.cpp b/Source/web/tests/FrameTestHelpers.cpp
index 3603e90486dc9923e7e1167fdb07194fcea5e5c4..ba2cf31dba49741403bf29c2c2b89fefe5987934 100644
--- a/Source/web/tests/FrameTestHelpers.cpp
+++ b/Source/web/tests/FrameTestHelpers.cpp
@@ -293,9 +293,9 @@
     return frame;
 }
 
-void TestWebFrameClient::frameDetached(WebFrame* frame, DetachType type)
-{
-    if (type == DetachType::Remove && frame->parent())
+void TestWebFrameClient::frameDetached(WebFrame* frame)
+{
+    if (frame->parent())
         frame->parent()->removeChild(frame);
     frame->close();
 }
@@ -331,9 +331,9 @@
 {
 }
 
-void TestWebRemoteFrameClient::frameDetached(DetachType type)
-{
-    if (type == DetachType::Remove && m_frame->parent())
+void TestWebRemoteFrameClient::frameDetached()
+{
+    if (m_frame->parent())
         m_frame->parent()->removeChild(m_frame);
     m_frame->close();
 }