Refactored PairingRegistry::Delegate such that it can retrieve/modify for a single client.

remoting/host/pairing_registry_delegate.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 REMOTING_HOST_PAIRING_REGISTRY_DELEGATE_H_
 #define REMOTING_HOST_PAIRING_REGISTRY_DELEGATE_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "remoting/protocol/pairing_registry.h"
 
 namespace base {
-class TaskRunner;
+class SingleThreadTaskRunner;
 }  // namespace base
 
 namespace remoting {
 // Returns a platform-specific pairing registry delegate that will save to
-// permanent storage using the specified TaskRunner. Returns NULL on platforms
-// that don't support pairing.
+// permanent storage. Returns NULL on platforms that don't support pairing.
 scoped_ptr<protocol::PairingRegistry::Delegate>
-CreatePairingRegistryDelegate(scoped_refptr<base::TaskRunner> task_runner);
+CreatePairingRegistryDelegate();
 
 // Convenience function which returns a new PairingRegistry, using the delegate
 // returned by CreatePairingRegistryDelegate().

[Jamie, 2013/08/01 22:44:04]

Please add something to this comment to explain what the task runner is used
for.

[alexeypa (please no reviews), 2013/08/01 23:07:43]

Done.

 scoped_refptr<protocol::PairingRegistry> CreatePairingRegistry(
-    scoped_refptr<base::TaskRunner> task_runner);
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner);
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_PAIRING_REGISTRY_DELEGATE_H_