Implement NavigationThrottle::BLOCK_REQUEST_AND_COLLAPSE.

third_party/WebKit/Source/web/WebLocalFrameImpl.h

 /*
  * Copyright (C) 2009 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 85 matching lines @@
   WebVector<WebIconURL> IconURLs(int icon_types_mask) const override;
   void SetSharedWorkerRepositoryClient(
       WebSharedWorkerRepositoryClient*) override;
   WebSize GetScrollOffset() const override;
   void SetScrollOffset(const WebSize&) override;
   WebSize ContentsSize() const override;
   bool HasVisibleContent() const override;
   WebRect VisibleContentRect() const override;
   bool HasHorizontalScrollbar() const override;
   bool HasVerticalScrollbar() const override;
+  void Collapse(bool) override;
   WebView* View() const override;
   WebDocument GetDocument() const override;
   WebPerformance Performance() const override;
   void DispatchUnloadEvent() override;
   void ExecuteScript(const WebScriptSource&) override;
   void ExecuteScriptInIsolatedWorld(int world_id,
                                     const WebScriptSource* sources,
                                     unsigned num_sources) override;
   void SetIsolatedWorldSecurityOrigin(int world_id,
                                       const WebSecurityOrigin&) override;
@@ skipping 405 matching lines @@
 
 DEFINE_TYPE_CASTS(WebLocalFrameImpl,
                   WebFrame,
                   frame,
                   frame->IsWebLocalFrame(),
                   frame.IsWebLocalFrame());
 
 }  // namespace blink
 
 #endif