Fix bluetooth adapter access in SystemTrayDelegateChromeOS.

chrome/browser/browser_process_platform_part_chromeos.h

 // Copyright (c) 2013 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 CHROME_BROWSER_BROWSER_PROCESS_PLATFORM_PART_CHROMEOS_H_
 #define CHROME_BROWSER_BROWSER_PROCESS_PLATFORM_PART_CHROMEOS_H_
 
 #include <memory>
 
 #include "base/compiler_specific.h"
@@ skipping 89 matching lines @@
 
   chromeos::TimeZoneResolver* GetTimezoneResolver();
 
   // Overridden from BrowserProcessPlatformPartBase:
   void StartTearDown() override;
 
   std::unique_ptr<policy::BrowserPolicyConnector> CreateBrowserPolicyConnector()
       override;
 
   chromeos::system::SystemClock* GetSystemClock();
+  void DestroySystemClock();
 
  private:
   void CreateProfileHelper();
 
   std::unique_ptr<session_manager::SessionManager> session_manager_;
 
   bool created_profile_helper_;
   std::unique_ptr<chromeos::ProfileHelper> profile_helper_;
 
   std::unique_ptr<chromeos::system::AutomaticRebootManager>
@@ skipping 11 matching lines @@
   std::unique_ptr<chromeos::TimeZoneResolver> timezone_resolver_;
 
   std::unique_ptr<chromeos::system::SystemClock> system_clock_;
 
   std::unique_ptr<ScopedKeepAlive> keep_alive_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserProcessPlatformPart);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_PLATFORM_PART_CHROMEOS_H_