bluetooth: Implement simulateCentral

device/bluetooth/test/fake_bluetooth.h

 // 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.
 #ifndef DEVICE_BLUETOOTH_TEST_FAKE_BLUETOOTH_H_
 #define DEVICE_BLUETOOTH_TEST_FAKE_BLUETOOTH_H_
 
 #include "base/compiler_specific.h"
 #include "device/bluetooth/public/interfaces/test/fake_bluetooth.mojom.h"
-#include "mojo/public/cpp/bindings/binding.h"
+#include "device/bluetooth/test/fake_le_central_observer_manager.h"
 
 namespace bluetooth {
 
 // Implementation of FakeBluetooth in
 // src/device/bluetooth/public/interfaces/test/fake_bluetooth.mojom.
-// Implemented on top of the C++ device/bluetooth API.
+// Implemented on top of the C++ device/bluetooth API, mainly
+// device/bluetooth/bluetooth_adapter_factory.h.
 class FakeBluetooth : NON_EXPORTED_BASE(public mojom::FakeBluetooth) {
  public:
   FakeBluetooth();
   ~FakeBluetooth() override;
 
   static void Create(mojom::FakeBluetoothRequest request);
 
   void SetLESupported(bool available,
                       const SetLESupportedCallback& callback) override;
+  void SimulateLECentralObserverManager(
+      mojom::LECentralObserverManagerState state,
+      const SimulateLECentralObserverManagerCallback& callback) override;
+
+ private:
+  scoped_refptr<FakeLECentralObserverManager> fake_manager_;
 };
 
 }  // namespace bluetooth
 
 #endif  // DEVICE_BLUETOOTH_TEST_FAKE_BLUETOOTH_H_