Inject CanAddURLToHistory into TopSitesImpl

net/dns/host_resolver_impl.cc

 // Copyright (c) 2012 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/dns/host_resolver_impl.h"
 
 #if defined(OS_WIN)
 #include <Winsock2.h>
 #elif defined(OS_POSIX)
 #include <netdb.h>
@@ skipping 2171 matching lines @@
         // (|prove_ipv6_support_| is false if |default_address_family_| is
         // set) so the code requesting the resolution should be amenable to
         // receiving a IPv6 resolution.
         ip_number == nullptr) {
       // Google DNS address.
       const uint8 kIPv6Address[] =
           { 0x20, 0x01, 0x48, 0x60, 0x48, 0x60, 0x00, 0x00,
             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x88 };
       IPAddressNumber address(kIPv6Address,
                               kIPv6Address + arraysize(kIPv6Address));
-      BoundNetLog probe_net_log = BoundNetLog::Make(
-          net_log.net_log(), NetLog::SOURCE_IPV6_REACHABILITY_CHECK);
-      probe_net_log.BeginEvent(NetLog::TYPE_IPV6_REACHABILITY_CHECK,
-                               net_log.source().ToEventParametersCallback());
-      bool rv6 = IsGloballyReachable(address, probe_net_log);
-      probe_net_log.EndEvent(NetLog::TYPE_IPV6_REACHABILITY_CHECK);
-      if (rv6) {
-        net_log.AddEvent(NetLog::TYPE_HOST_RESOLVER_IMPL_IPV6_SUPPORTED);
-      } else {
+      bool rv6 = IsGloballyReachable(address, net_log);
+      net_log.AddEvent(NetLog::TYPE_HOST_RESOLVER_IMPL_IPV6_REACHABILITY_CHECK,
+                       NetLog::BoolCallback("ipv6_available", rv6));
+      if (!rv6) {
         effective_address_family = ADDRESS_FAMILY_IPV4;
         effective_flags |= HOST_RESOLVER_DEFAULT_FAMILY_SET_DUE_TO_NO_IPV6;
       }
     } else {
       effective_address_family = default_address_family_;
     }
   }
 
   std::string hostname = info.hostname();
   // Redirect .localhost queries to "localhost." to make sure that they
@@ skipping 186 matching lines @@
     dns_client_->SetConfig(dns_config);
     num_dns_failures_ = 0;
     if (dns_client_->GetConfig())
       UMA_HISTOGRAM_BOOLEAN("AsyncDNS.DnsClientEnabled", true);
   }
 
   AbortDnsTasks();
 }
 
 }  // namespace net