Implemented Asynchronous Initialization of BluetoothAdapter.

device/bluetooth/bluetooth_adapter_win.h

 // 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 DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_WIN_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_WIN_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "device/bluetooth/bluetooth_adapter.h"
 #include "device/bluetooth/bluetooth_task_manager_win.h"
 
 namespace device {
 
 class BluetoothAdapterFactory;
 class BluetoothAdapterWinTest;
 class BluetoothDevice;
 
 class BluetoothAdapterWin : public BluetoothAdapter,
                             public BluetoothTaskManagerWin::Observer {
  public:
+  typedef base::Callback<void()> InitCallback;
+
   // BluetoothAdapter override
   virtual void AddObserver(BluetoothAdapter::Observer* observer) OVERRIDE;
   virtual void RemoveObserver(BluetoothAdapter::Observer* observer) OVERRIDE;
   virtual bool IsInitialized() const OVERRIDE;
   virtual bool IsPresent() const OVERRIDE;
   virtual bool IsPowered() const OVERRIDE;
   virtual void SetPowered(
       bool powered,
       const base::Closure& callback,
       const ErrorCallback& error_callback) OVERRIDE;
@@ skipping 10 matching lines @@
       const BluetoothOutOfBandPairingDataCallback& callback,
       const ErrorCallback& error_callback) OVERRIDE;
 
   // BluetoothTaskManagerWin::Observer override
   virtual void AdapterStateChanged(
       const BluetoothTaskManagerWin::AdapterState& state) OVERRIDE;
 
  protected:
   friend class BluetoothAdapterWinTest;
 
-  BluetoothAdapterWin();
+  BluetoothAdapterWin(const InitCallback& init_callback);
   virtual ~BluetoothAdapterWin();
 
  private:
   friend class BluetoothAdapterFactory;
 
   void TrackDefaultAdapter();
 
+  InitCallback init_callback_;
+  bool initialized_;
   bool powered_;
 
   scoped_refptr<BluetoothTaskManagerWin> task_manager_;
 
   base::ThreadChecker thread_checker_;
 
   // List of observers interested in event notifications from us.
   ObserverList<BluetoothAdapter::Observer> observers_;
 
   // NOTE: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<BluetoothAdapterWin> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothAdapterWin);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_WIN_H_