Require WebLocalFrame to be created with a non-null client

third_party/WebKit/Source/core/loader/EmptyClients.h

 /*
  * Copyright (C) 2006 Eric Seidel (eric@webkit.org)
  * Copyright (C) 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 192 matching lines @@
     void willBeDetached() override {}
     void detached(FrameDetachType) override {}
     void frameFocused() const override {}
 
     void dispatchWillSendRequest(ResourceRequest&) override {}
     void dispatchDidReceiveResponse(const ResourceResponse&) override {}
     void dispatchDidLoadResourceFromMemoryCache(const ResourceRequest&, const ResourceResponse&) override {}
 
     void dispatchDidHandleOnloadEvents() override {}
     void dispatchDidReceiveServerRedirectForProvisionalLoad() override {}
-    void dispatchWillClose() override {}
+    void dispatchWillCommitProvisionalLoad() override {}
     void dispatchDidStartProvisionalLoad(double triggeringEventTime) override {}
     void dispatchDidReceiveTitle(const String&) override {}
     void dispatchDidChangeIcons(IconType) override {}
     void dispatchDidCommitLoad(HistoryItem*, HistoryCommitType) override {}
     void dispatchDidFailProvisionalLoad(const ResourceError&, HistoryCommitType) override {}
     void dispatchDidFailLoad(const ResourceError&, HistoryCommitType) override {}
     void dispatchDidFinishDocumentLoad() override {}
     void dispatchDidFinishLoad() override {}
     void dispatchDidChangeThemeColor() override {}
 
@@ skipping 107 matching lines @@
     ~EmptyContextMenuClient() override {}
     bool showContextMenu(const ContextMenu*, bool) override { return false; }
     void clearContextMenu() override {}
 };
 
 CORE_EXPORT void fillWithEmptyClients(Page::PageClients&);
 
 } // namespace blink
 
 #endif // EmptyClients_h