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

chrome/browser/browser_process_impl.h

Index: chrome/browser/browser_process_impl.h
diff --git a/chrome/browser/browser_process_impl.h b/chrome/browser/browser_process_impl.h
index d476b5834c0bee8faf8740224f97adaf426fea5e..93e6ab3853f39ddf7db5585a74e63444b5cf6650 100644
--- a/chrome/browser/browser_process_impl.h
+++ b/chrome/browser/browser_process_impl.h
@@ -195,9 +195,9 @@ class BrowserProcessImpl : public BrowserProcess, public NonThreadSafe {
 
   virtual void CheckForInspectorFiles();
 
-#if (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)
+#if defined(OS_WIN)
   void StartAutoupdateTimer();
-#endif
+#endif  // OS_WIN
 
   virtual bool have_inspector_files() const {
     return have_inspector_files_;
@@ -314,7 +314,7 @@ class BrowserProcessImpl : public BrowserProcess, public NonThreadSafe {
   // Our best estimate about the existence of the inspector directory.
   bool have_inspector_files_;
 
-#if (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)
+#if defined(OS_WIN)
   base::RepeatingTimer<BrowserProcessImpl> autoupdate_timer_;
 
   // Gets called by autoupdate timer to see if browser needs restart and can be
@@ -322,7 +322,7 @@ class BrowserProcessImpl : public BrowserProcess, public NonThreadSafe {
   void OnAutoupdateTimer();
   bool CanAutorestartForUpdate() const;
   void RestartPersistentInstance();
-#endif  // defined(OS_WIN) || defined(OS_LINUX)
+#endif  // OS_WIN
 
   DISALLOW_COPY_AND_ASSIGN(BrowserProcessImpl);
 };