Remove the HostResolver::Shutdown() method....

chrome/browser/io_thread.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 "chrome/browser/io_thread.h"
 #include "base/command_line.h"
 #include "base/leak_tracker.h"
 #include "base/logging.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_thread.h"
@@ skipping 111 matching lines @@
     chrome_browser_net::FreeDnsPrefetchResources();
   }
 
   // Not initialized in Init().  May not be initialized.
   if (prefetch_observer_) {
     globals_->host_resolver->RemoveObserver(prefetch_observer_);
     delete prefetch_observer_;
     prefetch_observer_ = NULL;
   }
 
-  // TODO(eroman): temp hack for http://crbug.com/15513
-  globals_->host_resolver->Shutdown();
+  // TODO(eroman): hack http://crbug.com/15513
+  if (globals_->host_resolver->IsHostResolverImpl()) {
+    static_cast<net::HostResolverImpl*>(
+        globals_->host_resolver.get())->Shutdown();
+  }
 
   delete globals_;
   globals_ = NULL;
 
   // URLFetcher and URLRequest instances must NOT outlive the IO thread.
   //
   // Strictly speaking, URLFetcher's CheckForLeaks() should be done on the
   // UI thread. However, since there _shouldn't_ be any instances left
   // at this point, it shouldn't be a race.
   //
@@ skipping 40 matching lines @@
 
   // Clear the host cache to avoid showing entries from the OTR session
   // in about:net-internals.
   if (globals_->host_resolver->IsHostResolverImpl()) {
     net::HostCache* host_cache = static_cast<net::HostResolverImpl*>(
         globals_->host_resolver.get())->cache();
     if (host_cache)
       host_cache->clear();
   }
 }