Extract locking behaviour from ProcessSingleton.

chrome/browser/process_singleton.h

Index: chrome/browser/process_singleton.h
diff --git a/chrome/browser/process_singleton.h b/chrome/browser/process_singleton.h
index 439e170b30a9af6b3da3723967b8d65f65dc8836..04759078bcce7d62081ff4b330e8078fbf8a7027 100644
--- a/chrome/browser/process_singleton.h
+++ b/chrome/browser/process_singleton.h
@@ -84,30 +84,6 @@ class ProcessSingleton : public base::NonThreadSafe {
   // Clear any lock state during shutdown.
   void Cleanup();
 
-  // Blocks the dispatch of CopyData messages. foreground_window refers
-  // to the window that should be set to the foreground if a CopyData message
-  // is received while the ProcessSingleton is locked.
-  void Lock(gfx::NativeWindow foreground_window) {
-    DCHECK(CalledOnValidThread());
-    locked_ = true;
-    foreground_window_ = foreground_window;
-  }
-
-  // Changes the foreground window without changing the locked state.
-  void SetForegroundWindow(gfx::NativeWindow foreground_window) {
-    DCHECK(CalledOnValidThread());
-    foreground_window_ = foreground_window;
-  }
-
-  // Allows the dispatch of CopyData messages and replays the messages which
-  // were received when the ProcessSingleton was locked.
-  void Unlock();
-
-  bool locked() {
-    DCHECK(CalledOnValidThread());
-    return locked_;
-  }
-
 #if defined(OS_WIN)
   LRESULT WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam);
 #endif
@@ -138,16 +114,12 @@ class ProcessSingleton : public base::NonThreadSafe {
 #endif  // defined(OS_LINUX) || defined(OS_OPENBSD)
 
  private:
-  typedef std::pair<CommandLine::StringVector,
-                    base::FilePath> DelayedStartupMessage;
-
 #if !defined(OS_MACOSX)
   // Timeout for the current browser process to respond. 20 seconds should be
   // enough. It's only used in Windows and Linux implementations.
   static const int kTimeoutInSeconds = 20;
 #endif
 
-  bool locked_;
   gfx::NativeWindow foreground_window_;
   NotificationCallback notification_callback_;  // Handler for notifications.
 
@@ -211,10 +183,6 @@ class ProcessSingleton : public base::NonThreadSafe {
   int lock_fd_;
 #endif
 
-  // If messages are received in the locked state, the corresponding command
-  // lines are saved here to be replayed later.
-  std::vector<DelayedStartupMessage> saved_startup_messages_;
-
   DISALLOW_COPY_AND_ASSIGN(ProcessSingleton);
 };