[WebView] Remove onFailure from VisualStateCallback.

content/browser/frame_host/render_frame_host_impl.h

 // Copyright 2013 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 CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 461 matching lines @@
   void OnDidCommitProvisionalLoad(const IPC::Message& msg);
   void OnDidDropNavigation();
   void OnBeforeUnloadACK(
       bool proceed,
       const base::TimeTicks& renderer_before_unload_start_time,
       const base::TimeTicks& renderer_before_unload_end_time);
   void OnSwapOutACK();
   void OnRenderProcessGone(int status, int error_code);
   void OnContextMenu(const ContextMenuParams& params);
   void OnJavaScriptExecuteResponse(int id, const base::ListValue& result);
+  void OnVisualStateSwapInfo(int source_frame_number, bool swap_success);
   void OnVisualStateResponse(uint64 id);
   void OnRunJavaScriptMessage(const base::string16& message,
                               const base::string16& default_prompt,
                               const GURL& frame_url,
                               JavaScriptMessageType type,
                               IPC::Message* reply_msg);
   void OnRunBeforeUnloadConfirm(const GURL& frame_url,
                                 const base::string16& message,
                                 bool is_reload,
                                 IPC::Message* reply_msg);
@@ skipping 206 matching lines @@
   // PlzNavigate: Owns the stream used in navigations to store the body of the
   // response once it has started.
   scoped_ptr<StreamHandle> stream_handle_;
 
   // Context shared for each PermissionService instance created for this RFH.
   scoped_ptr<PermissionServiceContext> permission_service_context_;
 
   // NOTE: This must be the last member.
   base::WeakPtrFactory<RenderFrameHostImpl> weak_ptr_factory_;
 
+  std::pair<int, bool> last_swap_info_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_