[Merge to M50] [Chrome OS Bootstrapping]: Do not always power off the Bluetooth adapter.

device/hid/input_service_linux.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 DEVICE_HID_INPUT_SERVICE_LINUX_H_
 #define DEVICE_HID_INPUT_SERVICE_LINUX_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 50 matching lines @@
   ~InputServiceLinux() override;
 
   static InputServiceLinux* GetInstance();
   static bool HasInstance();
   static void SetForTesting(InputServiceLinux* service);
 
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   // Returns list of all currently connected input/hid devices.
-  void GetDevices(std::vector<InputDeviceInfo>* devices);
+  virtual void GetDevices(std::vector<InputDeviceInfo>* devices);
 
   // Returns an info about input device identified by |id|. When there're
   // no input or hid device with such id, returns false and doesn't
   // modify |info|.
   bool GetDeviceInfo(const std::string& id, InputDeviceInfo* info) const;
 
   // Implements base::MessageLoop::DestructionObserver
   void WillDestroyCurrentMessageLoop() override;
 
  protected:
@@ skipping 10 matching lines @@
   friend std::default_delete<InputServiceLinux>;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(InputServiceLinux);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_HID_INPUT_SERVICE_LINUX_H_