[cros] Define session_manager component with SessionManager base class

chrome/browser/chromeos/login/session/chrome_session_manager.cc

+// Copyright 2014 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/session/chrome_session_manager.h"
+
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/sys_info.h"
+#include "chrome/browser/chromeos/app_mode/kiosk_app_launch_error.h"
+#include "chrome/browser/chromeos/app_mode/kiosk_app_manager.h"
+#include "chrome/browser/chromeos/login/session/kiosk_auto_launcher_session_manager_delegate.h"
+#include "chrome/browser/chromeos/login/session/login_oobe_session_manager_delegate.h"
+#include "chrome/browser/chromeos/login/session/restore_after_crash_session_manager_delegate.h"
+#include "chrome/browser/chromeos/login/session/stub_login_session_manager_delegate.h"
+#include "chrome/browser/chromeos/login/users/user_manager.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chromeos/chromeos_switches.h"
+#include "chromeos/login/user_names.h"
+
+namespace chromeos {
+
+namespace {
+
+bool ShouldAutoLaunchKioskApp(const base::CommandLine& command_line) {
+  KioskAppManager* app_manager = KioskAppManager::Get();
+  return command_line.HasSwitch(switches::kLoginManager) &&
+         !command_line.HasSwitch(
+             switches::kForceLoginManagerInTests) &&
+         app_manager->IsAutoLaunchEnabled() &&
+         KioskAppLaunchError::Get() ==
+             KioskAppLaunchError::NONE;
+}
+
+}  // namespace
+
+// static
+scoped_ptr<session_manager::SessionManager>
+ChromeSessionManager::CreateSessionManager(
+    const base::CommandLine& parsed_command_line,
+    Profile* profile,
+    bool is_running_test) {
+  // Tests should be able to tune login manager before showing it. Thus only
+  // show login UI (login and out-of-box) in normal (non-testing) mode with
+  // --login-manager switch and if test passed --force-login-manager-in-tests.
+  bool force_login_screen_in_test = parsed_command_line.HasSwitch(
+      switches::kForceLoginManagerInTests);
+
+  // If kLoginUser is passed this indicates that user has already
+  // logged in and we should behave accordingly.
+  bool immediate_login =
+      parsed_command_line.HasSwitch(switches::kLoginUser);
+
+  std::string login_user_id =
+      parsed_command_line.GetSwitchValueASCII(switches::kLoginUser);
+
+  if (ShouldAutoLaunchKioskApp(parsed_command_line)) {
+    VLOG(1) << "Starting Chrome with KioskAutoLauncherSessionManagerDelegate";
+    return scoped_ptr<session_manager::SessionManager>(
+        new ChromeSessionManager(
+            new KioskAutoLauncherSessionManagerDelegate()));
+  } else if (parsed_command_line.HasSwitch(switches::kLoginManager) &&
+             (!is_running_test || force_login_screen_in_test)) {
+    VLOG(1) << "Starting Chrome with LoginOobeSessionManagerDelegate";
+    return scoped_ptr<session_manager::SessionManager>(
+        new ChromeSessionManager(
+            new LoginOobeSessionManagerDelegate()));
+  } else if (!base::SysInfo::IsRunningOnChromeOS() &&
+             login_user_id == login::kStubUser) {
+    VLOG(1) << "Starting Chrome with StubLoginSessionManagerDelegate";
+    return scoped_ptr<session_manager::SessionManager>(
+        new ChromeSessionManager(
+            new StubLoginSessionManagerDelegate(profile,
+                                                          login_user_id)));

[oshima, 2014/07/14 20:03:53]

indent. (or git cl format)

[Nikita (slow), 2014/07/15 10:18:42]

Done.

+  } else if (immediate_login) {
+    VLOG(1) << "Starting Chrome with  RestoreAfterCrashSessionManagerDelegate";
+    // Restarting Chrome inside existing user session. Possible cases:
+    // 1. Chrome is restarted after crash.
+    // 2. Chrome is started in browser_tests skipping the login flow.
+    // 3. Chrome is started on dev machine i.e. not on Chrome OS device w/o
+    //    login flow. In that case --login-user=[chromeos::login::kStubUser] is
+    //    added. See PreEarlyInitialization().
+    return scoped_ptr<session_manager::SessionManager>(
+        new ChromeSessionManager(
+            new RestoreAfterCrashSessionManagerDelegate(
+                profile, login_user_id)));
+  } else {

[oshima, 2014/07/14 20:03:53]

nit: you can omit this else.

+    VLOG(1) << "Starting Chrome with StubLoginSessionManagerDelegate";
+    return scoped_ptr<session_manager::SessionManager>(
+        new ChromeSessionManager(
+            new StubLoginSessionManagerDelegate(profile,
+                                                          login_user_id)));
+  }
+}
+
+ChromeSessionManager::ChromeSessionManager(
+    session_manager::SessionManagerDelegate* delegate) {
+  Initialize(delegate);
+}
+
+ChromeSessionManager::~ChromeSessionManager() {
+}
+
+}  // namespace chromeos