[cros] Fake a stub user login when no --login-manager and --login-user are given.

chrome/browser/chromeos/system/drm_settings.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/chromeos/system/drm_settings.h"
 
 #include "base/bind.h"
 #include "base/chromeos/chromeos_version.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
@@ skipping 86 matching lines @@
   if (!user_manager)
     return;
 
   // This preference is only meant to be called when a user
   // is logged in.
   if (!user_manager->IsUserLoggedIn()) {
     LOG(WARNING) << "Called without a logged in user!";
     return;
   }
 
-  // Don't generate files as a guest, demo user, or a stub.
+  // Don't generate files as a guest or demo user.
   if (user_manager->IsLoggedInAsGuest() ||
-      user_manager->IsLoggedInAsDemoUser() ||
-      user_manager->IsLoggedInAsStub())
+      user_manager->IsLoggedInAsDemoUser())
     return;
 
   // The user email address is included in the hash to keep the identifier
   // from being the same across users.
   std::string email = user_manager->GetLoggedInUser().email();
   // If there is no real user then there's nothing to do here.
   if (email.length() == 0) {
     LOG(WARNING) << "Unexpected 0 length user email.";
     return;
   }
 
   // Generate a DRM identifier on the FILE thread.
   // The DRM identifier is a per-user, per-OS-install identifier that is used
   // by privileged pepper plugins specifically for deriving
   // per-content-provider identifiers.  The user must be able to clear it,
   // reset it, and deny its use.
   BrowserThread::PostTask(
       BrowserThread::FILE, FROM_HERE,
       base::Bind(&ManageDrmIdentifierOnFileThread, enable, email));
 }
 
 }  // namespace system
 }  // namespace chromeos