Adding virtual destructor to CloudPrintURLFetcherFactory

chrome/service/cloud_print/cloud_print_url_fetcher.cc

 // Copyright (c) 2012 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 "chrome/service/cloud_print/cloud_print_url_fetcher.h"
 
 #include "base/stringprintf.h"
 #include "base/values.h"
 #include "chrome/common/cloud_print/cloud_print_constants.h"
 #include "chrome/common/cloud_print/cloud_print_helpers.h"
 #include "chrome/service/cloud_print/cloud_print_helpers.h"
 #include "chrome/service/cloud_print/cloud_print_token_store.h"
 #include "chrome/service/net/service_url_request_context.h"
 #include "chrome/service/service_process.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/load_flags.h"
 #include "net/http/http_status_code.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_request_status.h"
 
 namespace cloud_print {
 
 static CloudPrintURLFetcherFactory* g_factory = NULL;
 
+// virtual
+CloudPrintURLFetcherFactory::~CloudPrintURLFetcherFactory() {}
+
 // static
 CloudPrintURLFetcher* CloudPrintURLFetcher::Create() {
   CloudPrintURLFetcherFactory* factory = CloudPrintURLFetcher::factory();
   return factory ? factory->CreateCloudPrintURLFetcher() :
       new CloudPrintURLFetcher;
 }
 
 // static
 CloudPrintURLFetcherFactory* CloudPrintURLFetcher::factory() {
   return g_factory;
@@ skipping 192 matching lines @@
   ServiceURLRequestContextGetter* getter =
       g_service_process->GetServiceURLRequestContextGetter();
   // Now set up the user agent for cloudprint.
   std::string user_agent = getter->user_agent();
   base::StringAppendF(&user_agent, " %s", kCloudPrintUserAgent);
   getter->set_user_agent(user_agent);
   return getter;
 }
 
 }  // namespace cloud_print