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 "public/platform/WebInsecureRequestPolicy.h"
@@ skipping 31 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 document() const override;
   WebPerformance performance() const override;
   void dispatchUnloadEvent() override;
   void executeScript(const WebScriptSource&) override;
   void executeScriptInIsolatedWorld(int worldID,
                                     const WebScriptSource* sources,
                                     unsigned numSources) override;
   void setIsolatedWorldSecurityOrigin(int worldID,
                                       const WebSecurityOrigin&) override;
@@ skipping 129 matching lines @@
 
 DEFINE_TYPE_CASTS(WebRemoteFrameImpl,
                   WebFrame,
                   frame,
                   frame->isWebRemoteFrame(),
                   frame.isWebRemoteFrame());
 
 }  // namespace blink
 
 #endif  // WebRemoteFrameImpl_h