[Win] Fix crash if the profile dir cannot be created

chrome/browser/chrome_browser_main.cc

 // 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.
 
 #include "chrome/browser/chrome_browser_main.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 346 matching lines @@
     profile_path = g_browser_process->profile_manager()->GetProfileInfoCache().
         GetPathOfProfileAtIndex(0);
   }
   profile = g_browser_process->profile_manager()->GetProfile(
       profile_path);
 
   // If we're using the --new-profile-management flag and this profile is
   // signed out, then we should show the user manager instead. By switching
   // the active profile to the guest profile we ensure that no
   // browser windows will be opened for the guest profile.
-  if (switches::IsNewProfileManagement() && !profile->IsGuestSession()) {
+  if (switches::IsNewProfileManagement() &&
+      profile &&
+      !profile->IsGuestSession()) {
     ProfileInfoCache& cache =
         g_browser_process->profile_manager()->GetProfileInfoCache();
     size_t profile_index = cache.GetIndexOfProfileWithPath(profile_path);
 
     if (cache.ProfileIsSigninRequiredAtIndex(profile_index))
       profile = g_browser_process->profile_manager()->GetProfile(
           ProfileManager::GetGuestProfilePath());
   }
 #endif
   if (profile) {
@@ skipping 1332 matching lines @@
   chromeos::CrosSettings::Shutdown();
 #endif
 #endif
 }
 
 // Public members:
 
 void ChromeBrowserMainParts::AddParts(ChromeBrowserMainExtraParts* parts) {
   chrome_extra_parts_.push_back(parts);
 }