Add a mechanism to disable IPv6....

net/base/mock_host_resolver.cc

 // Copyright (c) 2009 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 147 matching lines @@
   rules_.push_back(rule);
 }
 
 void RuleBasedHostResolverProc::AddSimulatedFailure(
     const std::string& host_pattern) {
   Rule rule(Rule::kResolverTypeFail, host_pattern, "", 0);
   rules_.push_back(rule);
 }
 
 int RuleBasedHostResolverProc::Resolve(const std::string& host,
+                                       AddressFamily address_family,
                                        AddressList* addrlist) {
   RuleList::iterator r;
   for (r = rules_.begin(); r != rules_.end(); ++r) {
     if (MatchPattern(host, r->host_pattern)) {
       if (r->latency_ms != 0)
         PlatformThread::Sleep(r->latency_ms);
 
       // Remap to a new host.
       const std::string& effective_host =
           r->replacement.empty() ? host : r->replacement;
 
       // Apply the resolving function to the remapped hostname.
       switch (r->resolver_type) {
         case Rule::kResolverTypeFail:
           return ERR_NAME_NOT_RESOLVED;
         case Rule::kResolverTypeSystem:
-          return SystemHostResolverProc(effective_host, addrlist);
+          return SystemHostResolverProc(effective_host,
+                                        address_family,
+                                        addrlist);
         case Rule::kResolverTypeIPV6Literal:
           return ResolveIPV6LiteralUsingGURL(effective_host, addrlist);
         default:
           NOTREACHED();
           return ERR_UNEXPECTED;
       }
     }
   }
-  return ResolveUsingPrevious(host, addrlist);
+  return ResolveUsingPrevious(host, address_family, addrlist);
 }
 
 //-----------------------------------------------------------------------------
 
 ScopedDefaultHostResolverProc::ScopedDefaultHostResolverProc(
     HostResolverProc* proc) : current_proc_(proc) {
   previous_proc_ = HostResolverProc::SetDefault(current_proc_);
   current_proc_->set_previous_proc(previous_proc_);
 }
 
 ScopedDefaultHostResolverProc::~ScopedDefaultHostResolverProc() {
   HostResolverProc* old_proc = HostResolverProc::SetDefault(previous_proc_);
   // The lifetimes of multiple instances must be nested.
   CHECK(old_proc == current_proc_);
 }
 
 void ScopedDefaultHostResolverProc::Init(HostResolverProc* proc) {
   current_proc_ = proc;
   previous_proc_ = HostResolverProc::SetDefault(current_proc_);
   current_proc_->set_previous_proc(previous_proc_);
 }
 
 }  // namespace net