Implement prefetching in chrome

net/base/host_resolver_impl.cc

 // Copyright (c) 2010 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 <Winsock2.h>
 #elif defined(OS_POSIX)
 #include <netdb.h>
@@ skipping 542 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(IPv6ProbeJob);
 };
 
 //-----------------------------------------------------------------------------
 
 // We rely on the priority enum values being sequential having starting at 0,
 // and increasing for lower priorities.
 COMPILE_ASSERT(HIGHEST == 0u &&
                LOWEST > HIGHEST &&
-               NUM_PRIORITIES > LOWEST,
+               IDLE > LOWEST &&
+               NUM_PRIORITIES > IDLE,
                priority_indexes_incompatible);
 
 // JobPool contains all the information relating to queued requests, including
 // the limits on how many jobs are allowed to be used for this category of
 // requests.
 class HostResolverImpl::JobPool {
  public:
   JobPool(size_t max_outstanding_jobs, size_t max_pending_requests)
       : num_outstanding_jobs_(0u) {
     SetConstraints(max_outstanding_jobs, max_pending_requests);
@@ skipping 592 matching lines @@
     if (r == req)
       return error;
 
     r->OnComplete(error, AddressList());
   }
 
   return ERR_IO_PENDING;
 }
 
 }  // namespace net