HttpServerProperties - Don't persist if SetSupportsSpdy is called with

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 137 matching lines @@
   http_server_properties_impl_->Clear();
   UpdatePrefsFromCacheOnNetworkThread(completion);
 }
 
 bool HttpServerPropertiesManager::SupportsRequestPriority(
     const HostPortPair& server) {
   DCHECK(network_task_runner_->RunsTasksOnCurrentThread());
   return http_server_properties_impl_->SupportsRequestPriority(server);
 }
 
+bool HttpServerPropertiesManager::GetSupportsSpdy(const HostPortPair& server) {
+  DCHECK(network_task_runner_->RunsTasksOnCurrentThread());
+  return http_server_properties_impl_->GetSupportsSpdy(server);
+}
+
 void HttpServerPropertiesManager::SetSupportsSpdy(const HostPortPair& server,
                                                   bool support_spdy) {
   DCHECK(network_task_runner_->RunsTasksOnCurrentThread());
 
+  bool old_support_spdy = http_server_properties_impl_->GetSupportsSpdy(server);
   http_server_properties_impl_->SetSupportsSpdy(server, support_spdy);
-  ScheduleUpdatePrefsOnNetworkThread(SUPPORTS_SPDY);
+  bool new_support_spdy = http_server_properties_impl_->GetSupportsSpdy(server);
+  if (old_support_spdy != new_support_spdy)
+    ScheduleUpdatePrefsOnNetworkThread(SUPPORTS_SPDY);
 }
 
 bool HttpServerPropertiesManager::RequiresHTTP11(const HostPortPair& server) {
   DCHECK(network_task_runner_->RunsTasksOnCurrentThread());
   return http_server_properties_impl_->RequiresHTTP11(server);
 }
 
 void HttpServerPropertiesManager::SetHTTP11Required(
     const HostPortPair& server) {
   DCHECK(network_task_runner_->RunsTasksOnCurrentThread());
@@ skipping 787 matching lines @@
                                             server_network_stats_dict);
 }
 
 void HttpServerPropertiesManager::OnHttpServerPropertiesChanged() {
   DCHECK(pref_task_runner_->RunsTasksOnCurrentThread());
   if (!setting_prefs_)
     ScheduleUpdateCacheOnPrefThread();
 }
 
 }  // namespace net