Remove ProcessSingleton::FoundOtherProcessWindow() as it is no longer required.

chrome/browser/process_singleton.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.
 
 #ifndef CHROME_BROWSER_PROCESS_SINGLETON_H_
 #define CHROME_BROWSER_PROCESS_SINGLETON_H_
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
@@ skipping 65 matching lines @@
 
   // Sets ourself up as the singleton instance.  Returns true on success.  If
   // false is returned, we are not the singleton instance and the caller must
   // exit. Otherwise, stores the provided callback for notification from
   // future processes.
   // NOTE: Most callers should generally prefer NotifyOtherProcessOrCreate() to
   // this method, only callers for whom failure is prefered to notifying another
   // process should call this directly.
   bool Create(const NotificationCallback& notification_callback);
 
-#if defined(OS_WIN)
-  // Used in specific cases to let us know that there is an existing instance
-  // of Chrome running with this profile. In general, you should not use this
-  // function. Instead consider using NotifyOtherProcessOrCreate().
-  // For non profile-specific method, use
-  // browser_util::IsBrowserAlreadyRunning().
-  bool FoundOtherProcessWindow() const {
-      return (NULL != remote_window_);
-  }
-#endif  // defined(OS_WIN)
-
   // 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;
@@ skipping 121 matching lines @@
 #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);
 };
 
 #endif  // CHROME_BROWSER_PROCESS_SINGLETON_H_