Implement NavigationThrottle::BLOCK_REQUEST_AND_COLLAPSE.

third_party/WebKit/Source/web/WebRemoteFrameImpl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebRemoteFrameImpl_h
 #define WebRemoteFrameImpl_h
 
 #include "core/frame/RemoteFrame.h"
 #include "platform/heap/SelfKeepAlive.h"
 #include "platform/wtf/Compiler.h"
@@ skipping 29 matching lines @@
   void SetSharedWorkerRepositoryClient(
       WebSharedWorkerRepositoryClient*) override;
   void SetCanHaveScrollbars(bool) 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 119 matching lines @@
 
 DEFINE_TYPE_CASTS(WebRemoteFrameImpl,
                   WebFrame,
                   frame,
                   frame->IsWebRemoteFrame(),
                   frame.IsWebRemoteFrame());
 
 }  // namespace blink
 
 #endif  // WebRemoteFrameImpl_h