Add a mechanism to disable IPv6....

net/base/host_resolver_impl_unittest.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>
 #elif defined(OS_POSIX)
@@ skipping 28 matching lines @@
 class CapturingHostResolverProc : public HostResolverProc {
  public:
   explicit CapturingHostResolverProc(HostResolverProc* previous)
       : HostResolverProc(previous), event_(true, false) {
   }
 
   void Signal() {
     event_.Signal();
   }
 
-  virtual int Resolve(const std::string& host, AddressList* addrlist) {
+  virtual int Resolve(const std::string& host,
+                      AddressFamily address_family,
+                      AddressList* addrlist) {
     event_.Wait();
     {
       AutoLock l(lock_);
       capture_list_.push_back(host);
     }
-    return ResolveUsingPrevious(host, addrlist);
+    return ResolveUsingPrevious(host, address_family, addrlist);
   }
 
   std::vector<std::string> GetCaptureList() const {
     std::vector<std::string> copy;
     {
       AutoLock l(lock_);
       copy = capture_list_;
     }
     return copy;
   }
@@ skipping 886 matching lines @@
   EXPECT_EQ(0U, observer.finish_log.size());
   EXPECT_EQ(2U, observer.cancel_log.size());
 
   HostResolver::RequestInfo info("host2", 60);
   EXPECT_TRUE(observer.cancel_log[1] ==
               CapturingObserver::StartOrCancelEntry(1, info));
 }
 
 }  // namespace
 }  // namespace net