Fix crash on IP address change.

net/base/mock_host_resolver.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/mock_host_resolver.h"
 
 #include "base/string_util.h"
 #include "base/platform_thread.h"
 #include "base/ref_counted.h"
 #include "googleurl/src/url_canon_ip.h"
@@ skipping 48 matching lines @@
 }
 
 void MockHostResolverBase::AddObserver(Observer* observer) {
   impl_->AddObserver(observer);
 }
 
 void MockHostResolverBase::RemoveObserver(Observer* observer) {
   impl_->RemoveObserver(observer);
 }
 
-void MockHostResolverBase::Flush() {
-  impl_->Flush();
-}
-
 void MockHostResolverBase::Reset(HostResolverProc* interceptor) {
   synchronous_mode_ = false;
 
   // At the root of the chain, map everything to localhost.
   scoped_refptr<RuleBasedHostResolverProc> catchall =
       new RuleBasedHostResolverProc(NULL);
   catchall->AddRule("*", "127.0.0.1");
 
   // Next add a rules-based layer the use controls.
   rules_ = new RuleBasedHostResolverProc(catchall);
@@ skipping 154 matching lines @@
   CHECK_EQ(old_proc, current_proc_);
 }
 
 void ScopedDefaultHostResolverProc::Init(HostResolverProc* proc) {
   current_proc_ = proc;
   previous_proc_ = HostResolverProc::SetDefault(current_proc_);
   current_proc_->SetLastProc(previous_proc_);
 }
 
 }  // namespace net