Fix crash on IP address change.

net/base/mock_host_resolver.h

 // 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.
 
 #ifndef NET_BASE_MOCK_HOST_RESOLVER_H_
 #define NET_BASE_MOCK_HOST_RESOLVER_H_
 
 #include <list>
 
 #include "base/waitable_event.h"
@@ skipping 29 matching lines @@
  public:
   // HostResolver methods:
   virtual int Resolve(const RequestInfo& info,
                       AddressList* addresses,
                       CompletionCallback* callback,
                       RequestHandle* out_req,
                       const BoundNetLog& net_log);
   virtual void CancelRequest(RequestHandle req);
   virtual void AddObserver(Observer* observer);
   virtual void RemoveObserver(Observer* observer);
-  virtual void Flush();
 
   RuleBasedHostResolverProc* rules() { return rules_; }
 
-  const HostCache* cache() const { return impl_->cache(); }
-
   // Controls whether resolutions complete synchronously or asynchronously.
   void set_synchronous_mode(bool is_synchronous) {
     synchronous_mode_ = is_synchronous;
   }
 
   // Resets the mock.
   void Reset(HostResolverProc* interceptor);
 
  protected:
   MockHostResolverBase(bool use_caching);
@@ skipping 122 matching lines @@
   void Init(HostResolverProc* proc);
 
  private:
   scoped_refptr<HostResolverProc> current_proc_;
   scoped_refptr<HostResolverProc> previous_proc_;
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_MOCK_HOST_RESOLVER_H_