Refactor shutdown code to allow win/linux to run after last browser closes.

chrome/browser/profile_manager.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 <set>
 
 #include "chrome/browser/profile_manager.h"
 
 #include "app/l10n_util.h"
 #include "base/command_line.h"
@@ skipping 21 matching lines @@
 #include "net/url_request/url_request_job_tracker.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/cros/cryptohome_library.h"
 #endif
 
 // static
 void ProfileManager::ShutdownSessionServices() {
   ProfileManager* pm = g_browser_process->profile_manager();
+  if (!pm) // Is NULL when running unit tests.
+    return;
   for (ProfileManager::const_iterator i = pm->begin(); i != pm->end(); ++i)
     (*i)->ShutdownSessionService();
 }
 
 // static
 Profile* ProfileManager::GetDefaultProfile() {
   FilePath user_data_dir;
   PathService::Get(chrome::DIR_USER_DATA, &user_data_dir);
   ProfileManager* profile_manager = g_browser_process->profile_manager();
   return profile_manager->GetDefaultProfile(user_data_dir);
@@ skipping 232 matching lines @@
   if (!file_util::PathExists(path)) {
     // TODO(tc): http://b/1094718 Bad things happen if we can't write to the
     // profile directory.  We should eventually be able to run in this
     // situation.
     if (!file_util::CreateDirectory(path))
       return NULL;
   }
 
   return Profile::CreateProfile(path);
 }