Remove interface probing for IPv6 support from HostResolverImpl

net/dns/host_resolver_impl.cc

Index: net/dns/host_resolver_impl.cc
diff --git a/net/dns/host_resolver_impl.cc b/net/dns/host_resolver_impl.cc
index 87de903fc7eca46eb295709aa60d75b3c13d9789..9404d83fdc03d266c7cecdcbdb8ad9ae9249794c 100644
--- a/net/dns/host_resolver_impl.cc
+++ b/net/dns/host_resolver_impl.cc
@@ -922,54 +922,6 @@ class HostResolverImpl::ProcTask
 
 //-----------------------------------------------------------------------------
 
-// Wraps a call to TestIPv6Support to be executed on the WorkerPool as it takes
-// 40-100ms.
-// TODO(szym): Remove altogether, if IPv6ActiveProbe works.
-class HostResolverImpl::IPv6ProbeJob {
- public:
-  IPv6ProbeJob(const base::WeakPtr<HostResolverImpl>& resolver, NetLog* net_log)
-      : resolver_(resolver),
-        net_log_(BoundNetLog::Make(net_log, NetLog::SOURCE_IPV6_PROBE_JOB)),
-        result_(false, IPV6_SUPPORT_MAX, OK) {
-    DCHECK(resolver.get());
-    net_log_.BeginEvent(NetLog::TYPE_IPV6_PROBE_RUNNING);
-    const bool kIsSlow = true;
-    base::WorkerPool::PostTaskAndReply(
-        FROM_HERE,
-        base::Bind(&IPv6ProbeJob::DoProbe, base::Unretained(this)),
-        base::Bind(&IPv6ProbeJob::OnProbeComplete, base::Owned(this)),
-        kIsSlow);
-  }
-
-  virtual ~IPv6ProbeJob() {}
-
- private:
-  // Runs on worker thread.
-  void DoProbe() {
-    result_ = TestIPv6Support();
-  }
-
-  void OnProbeComplete() {
-    net_log_.EndEvent(NetLog::TYPE_IPV6_PROBE_RUNNING,
-                      base::Bind(&IPv6SupportResult::ToNetLogValue,
-                                 base::Unretained(&result_)));
-    if (!resolver_.get())
-      return;
-    resolver_->IPv6ProbeSetDefaultAddressFamily(
-        result_.ipv6_supported ? ADDRESS_FAMILY_UNSPECIFIED
-                                      : ADDRESS_FAMILY_IPV4);
-  }
-
-  // Used/set only on origin thread.
-  base::WeakPtr<HostResolverImpl> resolver_;
-
-  BoundNetLog net_log_;
-
-  IPv6SupportResult result_;
-
-  DISALLOW_COPY_AND_ASSIGN(IPv6ProbeJob);
-};
-
 // Wraps a call to HaveOnlyLoopbackAddresses to be executed on the WorkerPool as
 // it takes 40-100ms and should not block initialization.
 class HostResolverImpl::LoopbackProbeJob {
@@ -2083,20 +2035,6 @@ void HostResolverImpl::RemoveJob(Job* job) {
     jobs_.erase(it);
 }
 
-void HostResolverImpl::IPv6ProbeSetDefaultAddressFamily(
-    AddressFamily address_family) {
-  DCHECK(address_family == ADDRESS_FAMILY_UNSPECIFIED ||
-         address_family == ADDRESS_FAMILY_IPV4);
-  if (!ipv6_probe_monitoring_)
-    return;
-  if (default_address_family_ != address_family) {
-    VLOG(1) << "IPv6Probe forced AddressFamily setting to "
-            << ((address_family == ADDRESS_FAMILY_UNSPECIFIED) ?
-                "ADDRESS_FAMILY_UNSPECIFIED" : "ADDRESS_FAMILY_IPV4");
-  }
-  default_address_family_ = address_family;
-}
-
 void HostResolverImpl::SetHaveOnlyLoopbackAddresses(bool result) {
   if (result) {
     additional_resolver_flags_ |= HOST_RESOLVER_LOOPBACK_ONLY;
@@ -2194,8 +2132,6 @@ void HostResolverImpl::OnIPAddressChanged() {
   probe_weak_ptr_factory_.InvalidateWeakPtrs();
   if (cache_.get())
     cache_->clear();
-  if (ipv6_probe_monitoring_)
-    new IPv6ProbeJob(probe_weak_ptr_factory_.GetWeakPtr(), net_log_);
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
   new LoopbackProbeJob(probe_weak_ptr_factory_.GetWeakPtr());
 #endif