Reland "Add Linux support for the Bluetooth API"

chrome/browser/chrome_browser_main_linux.h

 // Copyright (c) 2012 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.
 
 // Contains functions used by BrowserMain() that are linux-specific.
 
 #ifndef CHROME_BROWSER_CHROME_BROWSER_MAIN_LINUX_H_
 #define CHROME_BROWSER_CHROME_BROWSER_MAIN_LINUX_H_
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/chrome_browser_main_posix.h"
 
 class ChromeBrowserMainPartsLinux : public ChromeBrowserMainPartsPosix {
  public:
   explicit ChromeBrowserMainPartsLinux(
       const content::MainFunctionParams& parameters);
   ~ChromeBrowserMainPartsLinux() override;
 
   // ChromeBrowserMainParts overrides.
   void ToolkitInitialized() override;
   void PreProfileInit() override;
   void PostProfileInit() override;
+  void PostMainMessageLoopStart() override;
+  void PostDestroyThreads() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainPartsLinux);
 };
 
 #endif  // CHROME_BROWSER_CHROME_BROWSER_MAIN_LINUX_H_