Fix a null AppCacheBackendImpl ptr crash in CompleteCrossSiteTransfer and re…

content/browser/appcache/appcache_interceptor.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 CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_
 #define CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "content/common/content_export.h"
 #include "content/public/common/resource_type.h"
 #include "net/url_request/url_request_interceptor.h"
 
 class GURL;
 
 namespace net {
 class URLRequest;
 }
 
 namespace content {
 class AppCacheRequestHandler;
 class AppCacheServiceImpl;
+class ResourceMessageFilter;
 
 // An interceptor to hijack requests and potentially service them out of
 // the appcache.
 class CONTENT_EXPORT AppCacheInterceptor : public net::URLRequestInterceptor {
  public:
   // Must be called to make a request eligible for retrieval from an appcache.
   static void SetExtraRequestInfo(net::URLRequest* request,
                                   AppCacheServiceImpl* service,
                                   int process_id,
                                   int host_id,
                                   ResourceType resource_type,
                                   bool should_reset_appcache);
 
   // May be called after response headers are complete to retrieve extra
   // info about the response.
   static void GetExtraResponseInfo(net::URLRequest* request,
                                    int64_t* cache_id,
                                    GURL* manifest_url);
 
   // Methods to support cross site navigations.
   static void PrepareForCrossSiteTransfer(net::URLRequest* request,
                                           int old_process_id);
   static void CompleteCrossSiteTransfer(net::URLRequest* request,
                                         int new_process_id,
-                                        int new_host_id);
+                                        int new_host_id,
+                                        ResourceMessageFilter* filter);
   static void MaybeCompleteCrossSiteTransferInOldProcess(
       net::URLRequest* request,
       int old_process_id);
 
   AppCacheInterceptor();
   ~AppCacheInterceptor() override;
 
  protected:
   // Override from net::URLRequestInterceptor:
   net::URLRequestJob* MaybeInterceptRequest(
@@ skipping 11 matching lines @@
   static void SetHandler(net::URLRequest* request,
                          AppCacheRequestHandler* handler);
   static AppCacheRequestHandler* GetHandler(net::URLRequest* request);
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheInterceptor);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_