Add ARC++ kiosk menu items and ability to start kiosk session.

chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc

Index: chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
diff --git a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
index 2edff5afe3d251c826d78dc795bcbbdfca6a8c74..80b9d62505258a5c84d7bdb2fe2cff366bd34783 100644
--- a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
+++ b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
@@ -448,7 +448,8 @@ void ChromeUserManagerImpl::Observe(
       break;
     case chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED: {
       Profile* profile = content::Details<Profile>(details).ptr();
-      if (IsUserLoggedIn() && !IsLoggedInAsGuest() && !IsLoggedInAsKioskApp()) {
+      if (IsUserLoggedIn() && !IsLoggedInAsGuest() && !IsLoggedInAsKioskApp() &&
+          !IsLoggedInAsArcKioskApp()) {
         if (IsLoggedInAsSupervisedUser())
           SupervisedUserPasswordServiceFactory::GetForProfile(profile);
         if (IsLoggedInAsUserWithGaiaAccount())
@@ -866,6 +867,25 @@ void ChromeUserManagerImpl::KioskAppLoggedIn(user_manager::User* user) {
   command_line->AppendSwitch(wm::switches::kWindowAnimationsDisabled);
 }
 
+void ChromeUserManagerImpl::ArcKioskAppLoggedIn(user_manager::User* user) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+  active_user_ = user;
+  active_user_->SetStubImage(
+      base::MakeUnique<user_manager::UserImage>(
+          *ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
+              IDR_PROFILE_PICTURE_LOADING)),
+      user_manager::User::USER_IMAGE_INVALID, false);
+
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  command_line->AppendSwitch(chromeos::switches::kEnableArc);

[hidehiko, 2016/11/16 18:57:07]

Could you set arc.enabled and arc.terms.accepted preference, too?

[xiyuan, 2016/11/16 19:00:17]

If we need to do this, we need to do it somewhere else, probably in
UserSessionManager::FinalizePrepareProfile. This is because the
ArcKioskAppLoggedIn and friends are called after cryptohome auth but before user
profile is finished loading. Thus PrefService is not available here.

[Sergey Poromov, 2016/11/17 12:33:13]

Both of these preferences are set fir ARC kiosk in
ArcAuthService::OnOptInPreferenceChanged()

+  command_line->AppendSwitch(::switches::kForceAndroidAppMode);
+
+  // Disable window animation since kiosk app runs in a single full screen
+  // window and window animation causes start-up janks.
+  command_line->AppendSwitch(wm::switches::kWindowAnimationsDisabled);
+}
+
 void ChromeUserManagerImpl::DemoAccountLoggedIn() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   active_user_ =