arc: Skip GMS Sign-In in case Android is already signed-in.

components/arc/common/auth.mojom

 // Copyright 2015 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.
 
-// Next MinVersion: 9
+// Next MinVersion: 10
 
 module arc.mojom;
 
 // These values describe failure reason of sign-in.
 [Extensible]
 enum ArcSignInFailureReason {
   // Negative values are reserved for internal use.
   // The values are shuffled to keep the backward compatibility and don't match
   // ProvisioningResult in arc_optin_uma.h
   // Next value: 16.
@@ skipping 43 matching lines @@
 
   // Cloud provisioning errors.
   CLOUD_PROVISION_FLOW_FAILED = 5,
   CLOUD_PROVISION_FLOW_TIMEOUT = 13,
   CLOUD_PROVISION_FLOW_INTERNAL_ERROR = 14,
 
   // Network connection is unavailable.
   [MinVersion=8] NO_NETWORK_CONNECTION = 15,
 };
 
+// These values describe account check status.
+[Extensible]
+enum AccountCheckStatus {
+    // Checked account exists and is up to date.
+    [MinVersion=9] UP_TO_DATE = 0,
+
+    // Checked account is new in the system.
+    [MinVersion=9] NEW = 1,
+
+    // Checked account exists but need to be reauthorized.
+    [MinVersion=9] NEED_REAUTH = 2,
+
+    // Checked account exists but it is in unknown state.
+    [MinVersion=9] UNKNOWN = 3,
+
+    // Account check has failed.
+    [MinVersion=9] CHECK_FAILED = 4,
+};
+
 // These values describe the type of the Chrome account to provision.
 [Extensible]
 enum ChromeAccountType {
   // Next value: 4
   UNKNOWN = 0,
 
   // Chrome login account type is a user account.
   USER_ACCOUNT = 1,
 
   // Chrome login account type is a robot (service) account.
@@ skipping 11 matching lines @@
 
   // Number of attempts to wait for Checkin task completed. 0 indicates that
   // Checkin task was already completed prior to GMS SignIn.
   CHECKIN_ATTEMPTS = 1,
 
   // Duration of waiting for Checkin task completed in milliseconds.
   CHECKIN_TIME_MILLISECONDS = 2,
 
   // Duration of waiting for sign-in completed in milliseconds.
   SIGNIN_TIME_MILLISECONDS = 3,
+
+  // Duration of checking the status of account.
+  [MinVersion=9] ACCOUNT_CHECK_MILLISECONDS = 4,
 };
 
 // The necessary information for Android to sign in and provision itself.
 struct AccountInfo {
+  // Name of account, used to map to existing Android account.
+  [MinVersion=9] string? account_name@4;
+
   // The authorization code that can be used in Android to sign in when
   // account_type is USER_ACCOUNT or ROBOT_ACCOUNT. If it is null in these
   // cases, sign-in will be skipped.
   string? auth_code@0;
 
   // If account_type is ACTIVE_DIRECTORY_ACCOUNT, this contains an enrollment
   // token for a Managed Google Play account. If it is null in this case,
   // sign-in will be skipped.
   [MinVersion=6] string? enrollment_token@3;
 
   // The type of Chrome account to provision.
   ChromeAccountType account_type@1;
 
   // Whether the account is managed from Chrome OS.
   bool is_managed@2;
 };
 
-// Next Method ID: 9.
+// Next Method ID: 10.
 interface AuthHost {
   // Notifies Chrome that the sign-in is completed successfully.
   [MinVersion=2] OnSignInComplete@2();
   // Notifies Chrome that the sign-in fails to complete and provides failure
   // reason.
   [MinVersion=2] OnSignInFailed@3(ArcSignInFailureReason reason);
   // Asynchronously requests an authorization code, as well as the account
   // information.
   [MinVersion=5] RequestAccountInfo@7();
 
   // Reports metrics to Chrome to be recorded in UMA.
   [MinVersion=7] ReportMetrics@8(MetricsType metrics_type, int32 value);
 
+  // Reports result of account check.
+  [MinVersion=9] ReportAccountCheckStatus@9(AccountCheckStatus status);
+
   // Deprecated methods:
 
   // Returns an authorization code, which can be used to sign in.
   GetAuthCodeDeprecated0@0() => (string auth_code);
   // Returns an authorization code in case is_enforced is set, which can be
   // used to sign in. By default the ChromeAccountType is USER_ACCOUNT.
   [MinVersion=1] GetAuthCodeDeprecated@1() => (string auth_code,
                                                bool is_enforced);
   // Returns an authorization code and its ChromeAccountType in case
   // is_enforced is set, which can be used to sign in.
   [MinVersion=4] GetAuthCodeAndAccountTypeDeprecated@5() => (
           string auth_code, bool is_enforced, ChromeAccountType account_type);
   // Gets whether the account is managed from Chrome OS.
   [MinVersion=3] GetIsAccountManagedDeprecated@4() => (bool is_managed);
 };
 
 // Next Method ID: 2
 interface AuthInstance {
   // Establishes full-duplex communication with the host.
   Init@0(AuthHost host_ptr);
 
   // Callback from RequestAccountInfo. This cannot be a normal callback since
   // the result can sometimes take a few minutes in some cases (Kiosk mode),
   // and in other cases there is a UI that the user is shown and they can take
   // an arbitrarily long amount of time to interact with.
   // If |account_info| is null, it implies that there was an error in the
   // process.
   [MinVersion=5] OnAccountInfoReady(AccountInfo? account_info);
 };