Introduce AlternateProtocolInfo.is_broken.

net/http/http_server_properties_manager.cc

 // Copyright 2014 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/http/http_server_properties_manager.h"
 
 #include "base/bind.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 728 matching lines @@
            ++it) {
         net::SpdySettingsIds id = it->first;
         uint32 value = it->second.second;
         std::string key = base::StringPrintf("%u", id);
         spdy_settings_dict->SetInteger(key, value);
       }
       server_pref_dict->SetWithoutPathExpansion("settings", spdy_settings_dict);
     }
 
     // Save alternate_protocol.
-    if (server_pref.alternate_protocol) {
+    const net::AlternateProtocolInfo* port_alternate_protocol =
+        server_pref.alternate_protocol;
+    if (port_alternate_protocol && !port_alternate_protocol->is_broken) {
       base::DictionaryValue* port_alternate_protocol_dict =
           new base::DictionaryValue;
-      const net::AlternateProtocolInfo* port_alternate_protocol =
-          server_pref.alternate_protocol;
       port_alternate_protocol_dict->SetInteger("port",
                                                port_alternate_protocol->port);
       const char* protocol_str =
           net::AlternateProtocolToString(port_alternate_protocol->protocol);
       port_alternate_protocol_dict->SetString("protocol_str", protocol_str);
       port_alternate_protocol_dict->SetDouble(
           "probability", port_alternate_protocol->probability);
       server_pref_dict->SetWithoutPathExpansion(
           "alternate_protocol", port_alternate_protocol_dict);
     }
@@ skipping 25 matching lines @@
     completion.Run();
 }
 
 void HttpServerPropertiesManager::OnHttpServerPropertiesChanged() {
   DCHECK(pref_task_runner_->RunsTasksOnCurrentThread());
   if (!setting_prefs_)
     ScheduleUpdateCacheOnPrefThread();
 }
 
 }  // namespace net