[Mac] Implement the update available notification in the wrench menu.

chrome/browser/browser_shutdown.cc

 // 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.
 
 #include "chrome/browser/browser_shutdown.h"
 
 #include <string>
 
 #include "app/resource_bundle.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/histogram.h"
 #include "base/path_service.h"
+#include "base/process_util.h"
 #include "base/string_util.h"
 #include "base/thread.h"
 #include "base/time.h"
 #include "base/waitable_event.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_thread.h"
 #include "chrome/browser/dom_ui/chrome_url_data_manager.h"
 #include "chrome/browser/first_run.h"
 #include "chrome/browser/jankometer.h"
@@ skipping 133 matching lines @@
     ResourceBundle::CleanupSharedInstance();
 
 #if defined(OS_WIN)
   if (!Upgrade::IsBrowserAlreadyRunning() &&
       shutdown_type_ != browser_shutdown::END_SESSION) {
     Upgrade::SwapNewChromeExeIfPresent();
   }
 #endif
 
   if (restart_last_session) {
-#if (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)
+#if !defined(OS_CHROMEOS)
     // Make sure to relaunch the browser with the same command line and add
     // Restore Last Session flag if session restore is not set.
     CommandLine command_line(*CommandLine::ForCurrentProcess());
     if (!command_line.HasSwitch(switches::kRestoreLastSession))
       command_line.AppendSwitch(switches::kRestoreLastSession);
+#if defined(OS_WIN) || defined(OS_LINUX)
     Upgrade::RelaunchChromeBrowser(command_line);
+#endif  // defined(OS_WIN) || defined(OS_LINUX)
+
+#if defined(OS_MACOSX)
+    command_line.AppendSwitch(switches::kActivateOnLaunch);
+    base::LaunchApp(command_line, false, false, NULL);
+#endif  // defined(OS_MACOSX)
+
 #else
     NOTIMPLEMENTED();
-#endif
+#endif  // !defined(OS_CHROMEOS)
   }
 
   if (shutdown_type_ > NOT_VALID && shutdown_num_processes_ > 0) {
     // Measure total shutdown time as late in the process as possible
     // and then write it to a file to be read at startup.
     // We can't use prefs since all services are shutdown at this point.
     TimeDelta shutdown_delta = Time::Now() - shutdown_started_;
     std::string shutdown_ms = Int64ToString(shutdown_delta.InMilliseconds());
     int len = static_cast<int>(shutdown_ms.length()) + 1;
     FilePath shutdown_ms_file = GetShutdownMsPath();
@@ skipping 70 matching lines @@
 void SetTryingToQuit(bool quitting) {
   g_trying_to_quit = quitting;
 }
 
 bool IsTryingToQuit() {
   return g_trying_to_quit;
 }
 #endif
 
 }  // namespace browser_shutdown