HttpServerProperties - Don't persist if SetSupportsSpdy is called with

net/http/http_server_properties_manager_unittest.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/basictypes.h"
 #include "base/json/json_writer.h"
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_registry_simple.h"
@@ skipping 371 matching lines @@
   ExpectScheduleUpdatePrefsOnNetworkThread();
 
   // Post an update task to the network thread. SetSupportsSpdy calls
   // ScheduleUpdatePrefsOnNetworkThread.
 
   // Add mail.google.com:443 as a supporting spdy server.
   HostPortPair spdy_server_mail("mail.google.com", 443);
   EXPECT_FALSE(
       http_server_props_manager_->SupportsRequestPriority(spdy_server_mail));
   http_server_props_manager_->SetSupportsSpdy(spdy_server_mail, true);
+  // ExpectScheduleUpdatePrefsOnNetworkThread() should be called only once.
+  http_server_props_manager_->SetSupportsSpdy(spdy_server_mail, true);
 
   // Run the task.
   base::RunLoop().RunUntilIdle();
 
   EXPECT_TRUE(
       http_server_props_manager_->SupportsRequestPriority(spdy_server_mail));
   Mock::VerifyAndClearExpectations(http_server_props_manager_.get());
 }
 
 TEST_F(HttpServerPropertiesManagerTest, SetSpdySetting) {
@@ skipping 415 matching lines @@
   // Run the task after shutdown, but before deletion.
   base::RunLoop().RunUntilIdle();
   Mock::VerifyAndClearExpectations(http_server_props_manager_.get());
   http_server_props_manager_.reset();
   base::RunLoop().RunUntilIdle();
 }
 
 }  // namespace
 
 }  // namespace net