Attempt to recover sync token for managed user once we detected that sync auth fails.

chrome/browser/chromeos/login/supervised_user_manager_impl.cc

 // Copyright 2013 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/login/supervised_user_manager_impl.h"
 
+#include "base/file_util.h"
+#include "base/files/file_path.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/scoped_user_pref_update.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
+#include "chrome/browser/chromeos/login/managed/locally_managed_user_constants.h"
 #include "chrome/browser/chromeos/login/managed/supervised_user_authentication.h"
 #include "chrome/browser/chromeos/login/user_manager_impl.h"
+#include "chrome/browser/chromeos/profiles/profile_helper.h"
+#include "chrome/browser/managed_mode/managed_user_service.h"
+#include "chrome/browser/managed_mode/managed_user_service_factory.h"
 #include "chromeos/settings/cros_settings_names.h"
 #include "content/public/browser/browser_thread.h"
 #include "google_apis/gaia/gaia_auth_util.h"
 
 using content::BrowserThread;
 
 namespace {
 
 // Names for pref keys in Local State.
 // A map from locally managed user local user id to sync user id.
@@ skipping 33 matching lines @@
     "SupervisedUserPasswordSchema";
 
 // A map from user id to password salt.
 const char kSupervisedUserPasswordSalt[] =
     "SupervisedUserPasswordSalt";
 
 // A map from user id to password revision.
 const char kSupervisedUserPasswordRevision[] =
     "SupervisedUserPasswordRevision";
 
+std::string LoadSyncToken(base::FilePath profile_dir) {
+  std::string token;
+  base::FilePath token_file =
+      profile_dir.Append(chromeos::kManagedUserTokenFilename);
+  VLOG(1) << "Loading" << token_file.value();
+  if (!base::ReadFileToString(token_file, &token)) {

[Nikita (slow), 2014/02/07 09:51:48]

nit: Drop {}

+    return std::string();
+  }
+  return token;
+}
+
 } // namespace
 
 namespace chromeos {
 
 const char kSchemaVersion[] = "SchemaVersion";
 const char kPasswordRevision[] = "PasswordRevision";
 const char kSalt[] = "PasswordSalt";
 const char kEncryptedPassword[] = "EncryptedPassword";
 const int kMinPasswordRevision = 1;
 
@@ skipping 330 matching lines @@
           it.key(),
           new base::StringValue(new_display_name));
     }
   }
 }
 
 SupervisedUserAuthentication* SupervisedUserManagerImpl::GetAuthentication() {
   return authentication_.get();
 }
 
+void SupervisedUserManagerImpl::LoadSupervisedUserToken(
+    Profile* profile,
+    const LoadTokenCallback& callback) {
+  base::FilePath profile_dir = ProfileHelper::GetProfilePathByUserIdHash(

[Nikita (slow), 2014/02/07 09:51:48]

profile->GetPath() should work too.

+      UserManager::Get()->GetUserByProfile(profile)->username_hash());
+  PostTaskAndReplyWithResult(
+      content::BrowserThread::GetBlockingPool(),
+      FROM_HERE,
+      base::Bind(&LoadSyncToken, profile_dir),
+      callback);
+}
+
+void SupervisedUserManagerImpl::ConfigureSyncWithToken(
+    Profile* profile,
+    const std::string& token) {
+  if (!token.empty())
+    ManagedUserServiceFactory::GetForProfile(profile)->InitSync(token);
+}
+
 }  // namespace chromeos