Revert r46023: "Detect new instance of the browser when running in the background in persistent"

chrome/browser/browser_process.h

 // Copyright (c) 2010 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.
 
 // This interface is for managing the global services of the application. Each
 // service is lazily created when requested the first time. The service getters
 // will return NULL if the service is not available, so callers must check for
 // this condition.
 
 #ifndef CHROME_BROWSER_BROWSER_PROCESS_H_
@@ skipping 121 matching lines @@
 
   // Returns a reference to the user-data-dir based profiles vector.
   std::vector<std::wstring>& user_data_dir_profiles() {
     return user_data_dir_profiles_;
   }
 
   // Trigger an asynchronous check to see if we have the inspector's files on
   // disk.
   virtual void CheckForInspectorFiles() = 0;
 
-#if (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)
+#if defined(OS_WIN)
+
   // This will start a timer that, if Chrome is in persistent mode, will check
   // whether an update is available, and if that's the case, restart the
   // browser. Note that restart code will strip some of the command line keys
   // and all loose values from the cl this instance of Chrome was launched with,
   // and add the command line key that will force Chrome to start in the
   // background mode. For the full list of "blacklisted" keys, refer to
   // |kSwitchesToRemoveOnAutorestart| array in browser_process_impl.cc.
   virtual void StartAutoupdateTimer() = 0;
-#endif
+
+#endif  // OS_WIN
 
   // Return true iff we found the inspector files on disk. It's possible to
   // call this function before we have a definite answer from the disk. In that
   // case, we default to returning true.
   virtual bool have_inspector_files() const = 0;
 
 #if defined(IPC_MESSAGE_LOG_ENABLED)
   // Enable or disable IPC logging for the browser, all processes
   // derived from ChildProcess (plugin etc), and all
   // renderers.
   virtual void SetIPCLoggingEnabled(bool enable) = 0;
 #endif
 
  private:
   // User-data-dir based profiles.
   std::vector<std::wstring> user_data_dir_profiles_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserProcess);
 };
 
 extern BrowserProcess* g_browser_process;
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_H_