arc: Consolidate IsArcAllowedForUser logic

components/arc/arc_util.cc

Index: components/arc/arc_util.cc
diff --git a/components/arc/arc_util.cc b/components/arc/arc_util.cc
index 963368e3bc4c366869ef303f26fcbfb5f94b2520..a3cd4a5e96b1f241ddab3a19d58afb4a518839e4 100644
--- a/components/arc/arc_util.cc
+++ b/components/arc/arc_util.cc
@@ -97,6 +97,29 @@ bool IsArcKioskMode() {
          user_manager::UserManager::Get()->IsLoggedInAsArcKioskApp();
 }
 
+bool IsArcAllowedForUser(const user_manager::User* user) {
+  if (!user) {
+    VLOG(1) << "No ARC for nullptr user.";
+    return false;
+  }
+
+  if (!user->HasGaiaAccount() && !(user->IsActiveDirectoryUser() &&
+                                   IsArcAllowedForActiveDirectoryUsers())) {
+    VLOG(1) << "Users without GAIA or active directory users without support"
+               " are not supported in ARC.";
+    return false;
+  }
+
+  // Do not allow for ephemeral data user. cf) b/26402681
+  if (user_manager::UserManager::Get()->IsUserCryptohomeDataEphemeral(
+          user->GetAccountId())) {
+    VLOG(1) << "Users with ephemeral data are not supported in ARC.";
+    return false;
+  }
+
+  return true;
+}
+
 bool IsArcAllowedForActiveDirectoryUsers() {
   const auto* command_line = base::CommandLine::ForCurrentProcess();