[Chrome OS Bootstrapping]: Do not always power off the Bluetooth adapter.

components/pairing/shark_connection_listener.h

 // Copyright 2014 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 COMPONENTS_PAIRING_SHARK_CONNECTION_LISTENER_H_
 #define COMPONENTS_PAIRING_SHARK_CONNECTION_LISTENER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "components/pairing/host_pairing_controller.h"
 
+namespace base {
+class SingleThreadTaskRunner;
+}
+
 namespace pairing_chromeos {
 
 // Listens for incoming connection from shark controller. If connection
 // is established, invokes callback passing HostPairingController
 // as an argument.
 class SharkConnectionListener : public HostPairingController::Observer {
  public:
   using OnConnectedCallback =
       base::Callback<void(std::unique_ptr<HostPairingController>)>;
 
-  explicit SharkConnectionListener(OnConnectedCallback callback);
+  SharkConnectionListener(
+      const scoped_refptr<base::SingleThreadTaskRunner>& file_task_runner,
+      OnConnectedCallback callback);
   ~SharkConnectionListener() override;
 
  private:
   typedef HostPairingController::Stage Stage;
 
   // HostPairingController::Observer overrides:
   void PairingStageChanged(Stage new_stage) override;
 
   OnConnectedCallback callback_;
   std::unique_ptr<HostPairingController> controller_;
 
   DISALLOW_COPY_AND_ASSIGN(SharkConnectionListener);
 };
 
 }  // namespace pairing_chromeos
 
 #endif  // COMPONENTS_PAIRING_SHARK_CONNECTION_LISTENER_H_