Check for the existance of a profile manager. Might not exist during early shutdown.

chrome/browser/browser_process_impl.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_process_impl.h"
 
 #include "app/clipboard/clipboard.h"
 #include "app/l10n_util.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
@@ skipping 250 matching lines @@
   DOMStorageContext::ClearLocalState(profile_path, chrome::kExtensionScheme);
   webkit_database::DatabaseTracker::ClearLocalState(profile_path,
       chrome::kExtensionScheme);
   ChromeAppCacheService::ClearLocalState(profile_path);
 }
 
 bool BrowserProcessImpl::ShouldClearLocalState(FilePath* profile_path) {
   FilePath user_data_dir;
   Profile* profile;
 
+  // Check for the existance of a profile manager. When quitting early,
+  // e.g. because another chrome instance is running, or when invoked with
+  // options such as --uninstall or --try-chrome-again=0, the profile manager
+  // does not exist yet.
+  if (!profile_manager_.get())
+    return false;
+
   PathService::Get(chrome::DIR_USER_DATA, &user_data_dir);
   profile = profile_manager_->GetDefaultProfile(user_data_dir);
   *profile_path = profile->GetPath();
   return profile->GetPrefs()->GetBoolean(prefs::kClearSiteDataOnExit);
 }
 
 void BrowserProcessImpl::CreateResourceDispatcherHost() {
   DCHECK(!created_resource_dispatcher_host_ &&
          resource_dispatcher_host_.get() == NULL);
   created_resource_dispatcher_host_ = true;
@@ skipping 199 matching lines @@
   DCHECK(file_thread_->message_loop() == MessageLoop::current());
   bool result = false;
 
   FilePath inspector_dir;
   if (PathService::Get(chrome::DIR_INSPECTOR, &inspector_dir)) {
     result = file_util::PathExists(inspector_dir);
   }
 
   have_inspector_files_ = result;
 }