bluetooth: Introduce SetLowEnergyAvailableForTesting

device/bluetooth/test/fake_bluetooth.cc

 // Copyright 2017 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.
 
 #include "device/bluetooth/test/fake_bluetooth.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
+#include "device/bluetooth/bluetooth_adapter_factory.h"
 #include "device/bluetooth/public/interfaces/test/fake_bluetooth.mojom.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 
 namespace bluetooth {
 
 FakeBluetooth::FakeBluetooth() {}
 FakeBluetooth::~FakeBluetooth() {}
 
 // static
 void FakeBluetooth::Create(mojom::FakeBluetoothRequest request) {
   mojo::MakeStrongBinding(base::MakeUnique<FakeBluetooth>(),
                           std::move(request));
 }
 
 void FakeBluetooth::SetLEAvailability(
     bool available,
     const SetLEAvailabilityCallback& callback) {
-  // TODO(crbug.com/569709): Actually implement this method.
+  device::BluetoothAdapterFactory::Get().SetLowEnergyAvailableForTesting(
+      available);
   callback.Run();
 }
 
 }  // namespace bluetooth