Fixing possible read on URLRequest when there is no more data.

chrome/browser/predictors/resource_prefetcher.h

 // Copyright (c) 2012 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 CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCHER_H_
 #define CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCHER_H_
 
 #include <map>
 #include <list>
 #include <vector>
@@ skipping 100 matching lines @@
   // out the Start() call to net::URLRequest for unittesting.
   virtual void StartURLRequest(net::URLRequest* request);
 
   // Marks the request as finished, with the given status.
   void FinishRequest(net::URLRequest* request, Request::PrefetchStatus status);
 
   // Reads the response data from the response - required for the resource to
   // be cached correctly. Stubbed out during testing.
   virtual void ReadFullResponse(net::URLRequest* request);
 
+  // Returns true if the request has more data that needs to be read. If it
+  // returns false, the request should not be referenced again.
+  bool ShouldContinueReadingRequest(net::URLRequest* request, int bytes_read);
+
   // net::URLRequest::Delegate methods.
   virtual void OnReceivedRedirect(net::URLRequest* request,
                                   const GURL& new_url,
                                   bool* defer_redirect) OVERRIDE;
   virtual void OnAuthRequired(net::URLRequest* request,
                               net::AuthChallengeInfo* auth_info) OVERRIDE;
   virtual void OnCertificateRequested(
       net::URLRequest* request,
       net::SSLCertRequestInfo* cert_request_info) OVERRIDE;
   virtual void OnSSLCertificateError(net::URLRequest* request,
@@ skipping 20 matching lines @@
   std::map<net::URLRequest*, Request*> inflight_requests_;
   std::list<Request*> request_queue_;
   std::map<std::string, int> host_inflight_counts_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourcePrefetcher);
 };
 
 }  // namespace predictors
 
 #endif  // CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCHER_H_