Detect new instance of the browser when running in the background in persiste...

chrome/browser/browser_process.h

Index: chrome/browser/browser_process.h
===================================================================
--- chrome/browser/browser_process.h	(revision 45984)
+++ chrome/browser/browser_process.h	(working copy)
@@ -139,8 +139,7 @@
   // disk.
   virtual void CheckForInspectorFiles() = 0;
 
-#if defined(OS_WIN)
-
+#if (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)
   // 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
@@ -149,9 +148,8 @@
   // 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.