Revert of Require WebLocalFrame to be created with a non-null client

third_party/WebKit/Source/web/tests/FrameTestHelpers.cpp

Index: third_party/WebKit/Source/web/tests/FrameTestHelpers.cpp
diff --git a/third_party/WebKit/Source/web/tests/FrameTestHelpers.cpp b/third_party/WebKit/Source/web/tests/FrameTestHelpers.cpp
index 693f9e4c04e504dabc264b7644ab32d80db49c48..0aa68619e95d1809523942cb8c54b5068af4ec39 100644
--- a/third_party/WebKit/Source/web/tests/FrameTestHelpers.cpp
+++ b/third_party/WebKit/Source/web/tests/FrameTestHelpers.cpp
@@ -275,11 +275,22 @@
 {
 }
 
-WebLocalFrame* TestWebFrameClient::createChildFrame(WebLocalFrame* parent, WebTreeScopeType scope, const WebString& name, const WebString& uniqueName, WebSandboxFlags sandboxFlags, const WebFrameOwnerProperties& frameOwnerProperties)
-{
-    WebLocalFrame* frame = WebLocalFrame::create(scope, this);
+WebFrame* TestWebFrameClient::createChildFrame(WebLocalFrame* parent, WebTreeScopeType scope, const WebString& name, const WebString& uniqueName, WebSandboxFlags sandboxFlags, const WebFrameOwnerProperties& frameOwnerProperties)
+{
+    WebFrame* frame = WebLocalFrame::create(scope, this);
     parent->appendChild(frame);
     return frame;
+}
+
+void TestWebFrameClient::frameDetached(WebLocalFrame* frame, DetachType type)
+{
+    if (type == DetachType::Remove && frame->parent())
+        frame->parent()->removeChild(frame);
+
+    if (frame->frameWidget())
+        frame->frameWidget()->close();
+
+    frame->close();
 }
 
 void TestWebFrameClient::didStartLoading(bool)