bluetooth: Move FactoryWrapper to device and expose a function for testing in chooser controller

content/browser/bluetooth/bluetooth_adapter_factory_wrapper.h

-// Copyright 2016 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 CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_ADAPTER_FACTORY_WRAPPER_H_
-#define CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_ADAPTER_FACTORY_WRAPPER_H_
-
-#include <unordered_set>
-
-#include "base/macros.h"
-#include "base/time/time.h"
-#include "content/common/content_export.h"
-#include "device/bluetooth/bluetooth_adapter.h"
-
-namespace content {
-
-class WebBluetoothServiceImpl;
-
-// Wrapper around BluetoothAdapterFactory that allows us to change
-// the underlying BluetoothAdapter object and have the observers
-// observe the new instance of the object.
-// TODO(ortuno): Once there is no need to swap the adapter to change its
-// behavior observers should add/remove themselves to/from the adapter.
-// http://crbug.com/603291
-class CONTENT_EXPORT BluetoothAdapterFactoryWrapper final {
- public:
-  typedef base::Callback<void(device::BluetoothAdapter*)>
-      AcquireAdapterCallback;
-
-  BluetoothAdapterFactoryWrapper();
-  ~BluetoothAdapterFactoryWrapper();
-
-  // Returns true if the platform supports Bluetooth or if
-  // SetBluetoothAdapterForTesting has been called.
-  bool IsBluetoothAdapterAvailable();
-
-  // Adds |observer| to the set of adapter observers. If another observer has
-  // acquired the adapter in the past it adds |observer| as an observer to that
-  // adapter, otherwise it gets a new adapter and adds |observer| to it. Runs
-  // |callback| with the adapter |observer| has been added to.
-  void AcquireAdapter(device::BluetoothAdapter::Observer* observer,
-                      const AcquireAdapterCallback& callback);
-  // Removes |observer| from the list of adapter observers if |observer|
-  // has acquired the adapter in the past. If there are no more observers
-  // it deletes the reference to the adapter.
-  void ReleaseAdapter(device::BluetoothAdapter::Observer* observer);
-
-  // Returns an adapter if |observer| has acquired an adapter in the past and
-  // this instance holds a reference to an adapter. Otherwise returns nullptr.
-  device::BluetoothAdapter* GetAdapter(
-      device::BluetoothAdapter::Observer* observer);
-
-  // The period of time a device discovery session should be active for.
-  // Returns 0 if SetBluetoothAdapterForTesting has been called.
-  base::TimeDelta GetScanDuration() { return scan_duration_; }
-
-  // Sets a new BluetoothAdapter to be returned by GetAdapter. When setting
-  // a new adapter all observers from the old adapter are removed and added
-  // to |mock_adapter|.
-  void SetBluetoothAdapterForTesting(
-      scoped_refptr<device::BluetoothAdapter> mock_adapter);
-
- private:
-  void OnGetAdapter(const AcquireAdapterCallback& continuation,
-                    scoped_refptr<device::BluetoothAdapter> adapter);
-
-  bool HasAdapter(device::BluetoothAdapter::Observer* observer);
-  void AddAdapterObserver(device::BluetoothAdapter::Observer* observer);
-  void RemoveAdapterObserver(device::BluetoothAdapter::Observer* observer);
-
-  // Sets |adapter_| to a BluetoothAdapter instance and register observers,
-  // releasing references to previous |adapter_|.
-  void set_adapter(scoped_refptr<device::BluetoothAdapter> adapter);
-
-  // A BluetoothAdapter instance representing an adapter of the system.
-  scoped_refptr<device::BluetoothAdapter> adapter_;
-
-  // We keep a list of all observers so that when the adapter gets swapped,
-  // we can remove all observers from the old adapter and add them to the
-  // new adapter.
-  std::unordered_set<device::BluetoothAdapter::Observer*> adapter_observers_;
-
-  // This is 0 if SetBluetoothAdapterForTesting has been called.
-  base::TimeDelta scan_duration_;
-
-  bool testing_;
-
-  // Weak pointer factory for generating 'this' pointers that might live longer
-  // than we do.
-  // 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<BluetoothAdapterFactoryWrapper> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(BluetoothAdapterFactoryWrapper);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_ADAPTER_FACTORY_WRAPPER_H_