Revert 138216 - [Sync] Turn notifier::PushClient into an interface

jingle/notifier/listener/non_blocking_push_client.h

Index: jingle/notifier/listener/non_blocking_push_client.h
===================================================================
--- jingle/notifier/listener/non_blocking_push_client.h	(revision 138220)
+++ jingle/notifier/listener/non_blocking_push_client.h	(working copy)
@@ -1,70 +0,0 @@
-// 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.
-
-#ifndef JINGLE_NOTIFIER_LISTENER_NON_BLOCKING_PUSH_CLIENT_H_
-#define JINGLE_NOTIFIER_LISTENER_NON_BLOCKING_PUSH_CLIENT_H_
-
-#include "base/basictypes.h"
-#include "base/callback_forward.h"
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "base/observer_list.h"
-#include "base/threading/non_thread_safe.h"
-#include "jingle/notifier/listener/push_client.h"
-
-namespace base {
-class SingleThreadTaskRunner;
-} // namespace base
-
-namespace notifier {
-
-// This class implements a PushClient that doesn't block; it delegates
-// to another blocking PushClient on a separate thread.
-//
-// This class must be used on a single thread.
-class NonBlockingPushClient : public PushClient {
- public:
-  // The type for a function that creates a (blocking) PushClient.
-  // Will be called on the delegate task runner.
-  typedef base::Callback<scoped_ptr<PushClient>()>
-      CreateBlockingPushClientCallback;
-
-  // Runs the given callback on the given task runner, and delegates
-  // to that PushClient.
-  explicit NonBlockingPushClient(
-      const scoped_refptr<base::SingleThreadTaskRunner>& delegate_task_runner,
-      const CreateBlockingPushClientCallback&
-          create_blocking_push_client_callback);
-  virtual ~NonBlockingPushClient();
-
-  // PushClient implementation.
-  virtual void AddObserver(PushClientObserver* observer) OVERRIDE;
-  virtual void RemoveObserver(PushClientObserver* observer) OVERRIDE;
-  virtual void UpdateSubscriptions(
-      const SubscriptionList& subscriptions) OVERRIDE;
-  virtual void UpdateCredentials(
-      const std::string& email, const std::string& token) OVERRIDE;
-  virtual void SendNotification(const Notification& notification) OVERRIDE;
-
- private:
-  class Core;
-
-  void OnNotificationStateChange(bool notifications_enabled);
-  void OnIncomingNotification(const Notification& notification);
-
-  base::NonThreadSafe non_thread_safe_;
-  base::WeakPtrFactory<NonBlockingPushClient> weak_ptr_factory_;
-  const scoped_refptr<base::SingleThreadTaskRunner> delegate_task_runner_;
-  const scoped_refptr<Core> core_;
-
-  ObserverList<PushClientObserver> observers_;
-
-  DISALLOW_COPY_AND_ASSIGN(NonBlockingPushClient);
-};
-
-}  // namespace notifier
-
-#endif  // JINGLE_NOTIFIER_LISTENER_NON_BLOCKING_PUSH_CLIENT_H_