Add ArcEnabled policy implementation

chrome/browser/chromeos/arc/arc_auth_service.cc

Index: chrome/browser/chromeos/arc/arc_auth_service.cc
diff --git a/chrome/browser/chromeos/arc/arc_auth_service.cc b/chrome/browser/chromeos/arc/arc_auth_service.cc
index 0c12cb97c2f2c5d033fcf5c624760fb23445bf31..c6a31462bab58b2285f250a83a5e07baf5797101 100644
--- a/chrome/browser/chromeos/arc/arc_auth_service.cc
+++ b/chrome/browser/chromeos/arc/arc_auth_service.cc
@@ -194,24 +194,17 @@ void ArcAuthService::OnPrimaryUserProfilePrepared(Profile* profile) {
       profile_, GURL(site_url));
   CHECK(storage_partition_);
 
-  // In case UI is disabled we assume that ARC is opted-in.
-  if (!IsOptInVerificationDisabled()) {
-    pref_change_registrar_.Init(profile_->GetPrefs());
-    pref_change_registrar_.Add(
-        prefs::kArcEnabled,
-        base::Bind(&ArcAuthService::OnOptInPreferenceChanged,
-                   base::Unretained(this)));
-    if (profile_->GetPrefs()->GetBoolean(prefs::kArcEnabled)) {
-      OnOptInPreferenceChanged();
-    } else {
-      if (!disable_ui_for_testing && profile_->IsNewProfile()) {
-        PrefServiceSyncableFromProfile(profile_)->AddObserver(this);
-        OnIsSyncingChanged();
-      }
-    }
+  pref_change_registrar_.Init(profile_->GetPrefs());
+  pref_change_registrar_.Add(
+      prefs::kArcEnabled, base::Bind(&ArcAuthService::OnOptInPreferenceChanged,
+                                     base::Unretained(this)));
+  if (profile_->GetPrefs()->GetBoolean(prefs::kArcEnabled)) {
+    OnOptInPreferenceChanged();
   } else {
-    auth_code_.clear();
-    StartArc();
+    if (!disable_ui_for_testing && profile_->IsNewProfile()) {
+      PrefServiceSyncableFromProfile(profile_)->AddObserver(this);
+      OnIsSyncingChanged();
+    }
   }
 }
 
@@ -291,16 +284,20 @@ void ArcAuthService::OnOptInPreferenceChanged() {
 
   if (profile_->GetPrefs()->GetBoolean(prefs::kArcEnabled)) {
     if (state_ != State::ACTIVE) {
-      CloseUI();
       auth_code_.clear();
 
-      if (!profile_->GetPrefs()->GetBoolean(prefs::kArcSignedIn)) {
-        // Need pre-fetch auth code and show OptIn UI if needed.
-        initial_opt_in_ = true;
-        SetState(State::FETCHING_CODE);
-        FetchAuthCode();
+      if (!IsOptInVerificationDisabled()) {
+        CloseUI();
+        if (!profile_->GetPrefs()->GetBoolean(prefs::kArcSignedIn)) {
+          // Need pre-fetch auth code and show OptIn UI if needed.
+          initial_opt_in_ = true;
+          SetState(State::FETCHING_CODE);
+          FetchAuthCode();
+        } else {
+          // Ready to start Arc.
+          StartArc();
+        }
       } else {
-        // Ready to start Arc.
         StartArc();
       }
     }