Check Firewall state only initializing mDns from PrintPreview.

chrome/browser/local_discovery/service_discovery_shared_client.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_SHARED_CLIENT_H_
 #define CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_SHARED_CLIENT_H_
 
 #include "chrome/common/local_discovery/service_discovery_client.h"
 
 namespace local_discovery {
 
 class ServiceDiscoverySharedClient
     : public base::RefCounted<ServiceDiscoverySharedClient>,
       public ServiceDiscoveryClient {
  public:
   static scoped_refptr<ServiceDiscoverySharedClient> GetInstance();

[Noam Samuel, 2014/08/27 17:58:56]

Maybe add a comment here that this is deprecated and a todo to remove it? Or do
you think this should stay?

[Vitaly Buka (NO REVIEWS), 2014/08/27 18:08:27]

Actually this is still primary call.
GetInstanceWithoutAlert would be gone in future.

On 2014/08/27 17:58:56, Noam Samuel wrote:

 
+  typedef base::Callback<void(scoped_refptr<ServiceDiscoverySharedClient>)>
+      GetInstanceCallback;
+  static void GetInstanceWithoutAlert(const GetInstanceCallback& callback);
+
  protected:
   ServiceDiscoverySharedClient();
   virtual ~ServiceDiscoverySharedClient();
 
  private:
   friend class base::RefCounted<ServiceDiscoverySharedClient>;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceDiscoverySharedClient);
 };
 
 }  // namespace local_discovery
 
 #endif  // CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_SHARED_CLIENT_H_