Make HttpServerProperties::GetSupportsQuic not host-specific.

net/http/http_server_properties_impl.cc

Index: net/http/http_server_properties_impl.cc
diff --git a/net/http/http_server_properties_impl.cc b/net/http/http_server_properties_impl.cc
index a53e73fded1f969e45a5361f0d7d009d4fd57c87..b971b29218585818dc35ce9d90bf02e4f6fc269f 100644
--- a/net/http/http_server_properties_impl.cc
+++ b/net/http/http_server_properties_impl.cc
@@ -102,12 +102,9 @@ void HttpServerPropertiesImpl::InitializeSpdySettingsServers(
 }
 
 void HttpServerPropertiesImpl::InitializeSupportsQuic(
-    SupportsQuicMap* supports_quic_map) {
-  for (SupportsQuicMap::reverse_iterator it = supports_quic_map->rbegin();
-       it != supports_quic_map->rend();
-       ++it) {
-    supports_quic_map_.insert(std::make_pair(it->first, it->second));
-  }
+    IPAddressNumber* last_address) {
+  if (last_address)
+    last_quic_address_ = *last_address;
 }
 
 void HttpServerPropertiesImpl::InitializeServerNetworkStats(
@@ -164,7 +161,7 @@ void HttpServerPropertiesImpl::Clear() {
   alternate_protocol_map_.Clear();
   canonical_host_to_origin_map_.clear();
   spdy_settings_map_.Clear();
-  supports_quic_map_.clear();
+  last_quic_address_.clear();
   server_network_stats_map_.Clear();
 }
 
@@ -423,26 +420,22 @@ HttpServerPropertiesImpl::spdy_settings_map() const {
   return spdy_settings_map_;
 }
 
-SupportsQuic HttpServerPropertiesImpl::GetSupportsQuic(
-    const HostPortPair& host_port_pair) const {
-  SupportsQuicMap::const_iterator it = supports_quic_map_.find(host_port_pair);
-  if (it == supports_quic_map_.end()) {
-    CR_DEFINE_STATIC_LOCAL(SupportsQuic, kEmptySupportsQuic, ());
-    return kEmptySupportsQuic;
-  }
-  return it->second;
-}
+bool HttpServerPropertiesImpl::GetSupportsQuic(
+    IPAddressNumber* last_address) const {
+  if (last_quic_address_.empty())
+    return false;
 
-void HttpServerPropertiesImpl::SetSupportsQuic(
-    const HostPortPair& host_port_pair,
-    bool used_quic,
-    const std::string& address) {
-  SupportsQuic supports_quic(used_quic, address);
-  supports_quic_map_.insert(std::make_pair(host_port_pair, supports_quic));
+  *last_address = last_quic_address_;
+  return true;
 }
 
-const SupportsQuicMap& HttpServerPropertiesImpl::supports_quic_map() const {
-  return supports_quic_map_;
+void HttpServerPropertiesImpl::SetSupportsQuic(bool used_quic,
+                                               const IPAddressNumber& address) {
+  if (!used_quic) {
+    last_quic_address_.clear();
+  } else {
+    last_quic_address_ = address;
+  }
 }
 
 void HttpServerPropertiesImpl::SetServerNetworkStats(