Inject CanAddURLToHistory into TopSitesImpl

net/log/net_log_event_type_list.h

Index: net/log/net_log_event_type_list.h
diff --git a/net/log/net_log_event_type_list.h b/net/log/net_log_event_type_list.h
index 9337181af10877ef87de31f744f858bd385c7caa..c2cc7f25714bbbe8809780ac7c27bd820190c9e1 100644
--- a/net/log/net_log_event_type_list.h
+++ b/net/log/net_log_event_type_list.h
@@ -54,8 +54,14 @@ EVENT_TYPE(REQUEST_ALIVE)
 //   }
 EVENT_TYPE(HOST_RESOLVER_IMPL_REQUEST)
 
-// This event is logged when IPv6 support is determined via IPv6 connect probe.
-EVENT_TYPE(HOST_RESOLVER_IMPL_IPV6_SUPPORTED)
+// This event is created (in a source of the same name) when the host resolver
+// creates a UDP socket to check for global IPv6 connectivity.
+// It contains the following parameter:
+//
+//   {
+//     "ipv6_available": <True if the probe indicates ipv6 connectivity>,
+//   }
+EVENT_TYPE(HOST_RESOLVER_IMPL_IPV6_REACHABILITY_CHECK)
 
 // This event is logged when a request is handled by a cache entry.
 EVENT_TYPE(HOST_RESOLVER_IMPL_CACHE_HIT)
@@ -2421,10 +2427,6 @@ EVENT_TYPE(SIMPLE_CACHE_ENTRY_CLOSE_BEGIN)
 // contains no parameters.
 EVENT_TYPE(SIMPLE_CACHE_ENTRY_CLOSE_END)
 
-// This event is created (in a source of the same name) when the internal DNS
-// resolver creates a UDP socket to check for global IPv6 connectivity.
-EVENT_TYPE(IPV6_REACHABILITY_CHECK)
-
 // ------------------------------------------------------------------------
 // SDCH
 // ------------------------------------------------------------------------