Update a bug number referenced by some TODOs, to point at the new bug for tra...

net/base/host_resolver_impl.cc

 // Copyright (c) 2006-2008 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.
 
 #include "net/base/host_resolver_impl.h"
 
 #if defined(OS_WIN)
 #include <ws2tcpip.h>
 #include <wspiapi.h>  // Needed for Win2k compat.
 #elif defined(OS_POSIX)
@@ skipping 351 matching lines @@
   }
 
   // Completion happens during OnJobComplete(Job*).
   return ERR_IO_PENDING;
 }
 
 // See OnJobComplete(Job*) for why it is important not to clean out
 // cancelled requests from Job::requests_.
 void HostResolverImpl::CancelRequest(RequestHandle req_handle) {
   if (shutdown_) {
-    // TODO(eroman): temp hack for: http://crbug.com/16972.
-    // Because we destroy outstanding requests during Shutdown() as part of
-    // hack http://crbug.com/15513, |req_handle| is already cancelled.
+    // TODO(eroman): temp hack for: http://crbug.com/18373
+    // Because we destroy outstanding requests during Shutdown(),
+    // |req_handle| is already cancelled.
     LOG(ERROR) << "Called HostResolverImpl::CancelRequest() after Shutdown().";
     StackTrace().PrintBacktrace();
     return;
   }
   Request* req = reinterpret_cast<Request*>(req_handle);
   DCHECK(req);
   DCHECK(req->job());
   // NULL out the fields of req, to mark it as cancelled.
   req->MarkAsCancelled();
   NotifyObserversCancelRequest(req->id(), req->info());
@@ skipping 98 matching lines @@
 
 void HostResolverImpl::NotifyObserversCancelRequest(int request_id,
                                                 const RequestInfo& info) {
   for (ObserversList::iterator it = observers_.begin();
        it != observers_.end(); ++it) {
     (*it)->OnCancelResolution(request_id, info);
   }
 }
 
 }  // namespace net