[iOS] Prepare to move ios/c/b/signin to model subfolder

iOS is refactoring this code to move these files into a subfolder. This
prepares for that migration.

This is part of a multi-step CL:
1. This
2. crrev.com/i/6606688
3. TBD

Bug: 1480356
Change-Id: I426b4ffcdb15a477e73e387db64c59470a29ca92
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4981052
Reviewed-by: Jérôme Lebel <jlebel@chromium.org>
Commit-Queue: Robbie Gibson <rkgibson@google.com>
Cr-Commit-Position: refs/heads/main@{#1216208}

ios/chrome/browser/signin/model/BUILD.gn

@@ -0,0 +1,74 @@
+# Copyright 2016 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+source_set("model") {
+  sources = [
+    "authentication_service.h",
+    "authentication_service_factory.h",
+    "authentication_service_observer.h",
+    "chrome_account_manager_service.h",
+    "chrome_account_manager_service_factory.h",
+    "identity_manager_factory.h",
+  ]
+  public_deps = [ "//ios/chrome/browser/signin" ]
+}
+
+source_set("signin_util") {
+  sources = [ "signin_util.h" ]
+  public_deps = [ "//ios/chrome/browser/signin:signin_util" ]
+}
+
+source_set("capabilities_types") {
+  sources = [
+    "capabilities_dict.h",
+    "capabilities_types.h",
+  ]
+  public_deps = [ "//ios/chrome/browser/signin:capabilities_types" ]
+}
+
+source_set("constants") {
+  sources = [ "constants.h" ]
+  public_deps = [ "//ios/chrome/browser/signin:constants" ]
+}
+
+source_set("system_identity") {
+  sources = [ "system_identity.h" ]
+  public_deps = [ "//ios/chrome/browser/signin:system_identity" ]
+}
+
+source_set("system_identity_manager") {
+  sources = [
+    "refresh_access_token_error.h",
+    "system_identity_interaction_manager.h",
+    "system_identity_manager.h",
+    "system_identity_manager_observer.h",
+  ]
+  public_deps = [ "//ios/chrome/browser/signin:system_identity_manager" ]
+}
+
+source_set("fake_system_identity_manager") {
+  testonly = true
+  sources = [ "fake_system_identity_manager.h" ]
+  public_deps = [ "//ios/chrome/browser/signin:fake_system_identity_manager" ]
+}
+
+source_set("fake_system_identity") {
+  testonly = true
+  sources = [ "fake_system_identity.h" ]
+  public_deps = [ "//ios/chrome/browser/signin:fake_system_identity" ]
+}
+
+source_set("trusted_vault") {
+  sources = [ "trusted_vault_client_backend.h" ]
+  public_deps = [ "//ios/chrome/browser/signin:trusted_vault" ]
+}
+
+source_set("test_support") {
+  testonly = true
+  sources = [
+    "fake_authentication_service_delegate.h",
+    "identity_test_environment_browser_state_adaptor.h",
+  ]
+  public_deps = [ "//ios/chrome/browser/signin:test_support" ]
+}

ios/chrome/browser/signin/model/authentication_service.h

@@ -0,0 +1,10 @@
+// Copyright 2013 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_AUTHENTICATION_SERVICE_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_AUTHENTICATION_SERVICE_H_
+
+#import "ios/chrome/browser/signin/authentication_service.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_AUTHENTICATION_SERVICE_H_

ios/chrome/browser/signin/model/authentication_service_factory.h

@@ -0,0 +1,10 @@
+// Copyright 2013 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_AUTHENTICATION_SERVICE_FACTORY_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_AUTHENTICATION_SERVICE_FACTORY_H_
+
+#include "ios/chrome/browser/signin/authentication_service_factory.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_AUTHENTICATION_SERVICE_FACTORY_H_

ios/chrome/browser/signin/model/authentication_service_observer.h

@@ -0,0 +1,10 @@
+// Copyright 2021 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_AUTHENTICATION_SERVICE_OBSERVER_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_AUTHENTICATION_SERVICE_OBSERVER_H_
+
+#include "ios/chrome/browser/signin/authentication_service_observer.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_AUTHENTICATION_SERVICE_OBSERVER_H_

ios/chrome/browser/signin/model/capabilities_dict.h

@@ -0,0 +1,10 @@
+// Copyright 2022 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_CAPABILITIES_DICT_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_CAPABILITIES_DICT_H_
+
+#include "ios/chrome/browser/signin/capabilities_dict.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_CAPABILITIES_DICT_H_

ios/chrome/browser/signin/model/capabilities_types.h

@@ -0,0 +1,10 @@
+// Copyright 2022 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_CAPABILITIES_TYPES_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_CAPABILITIES_TYPES_H_
+
+#include "ios/chrome/browser/signin/capabilities_types.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_CAPABILITIES_TYPES_H_

ios/chrome/browser/signin/model/chrome_account_manager_service.h

@@ -0,0 +1,10 @@
+// Copyright 2021 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_CHROME_ACCOUNT_MANAGER_SERVICE_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_CHROME_ACCOUNT_MANAGER_SERVICE_H_
+
+#include "ios/chrome/browser/signin/chrome_account_manager_service.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_CHROME_ACCOUNT_MANAGER_SERVICE_H_

ios/chrome/browser/signin/model/chrome_account_manager_service_factory.h

@@ -0,0 +1,10 @@
+// Copyright 2021 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_CHROME_ACCOUNT_MANAGER_SERVICE_FACTORY_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_CHROME_ACCOUNT_MANAGER_SERVICE_FACTORY_H_
+
+#include "ios/chrome/browser/signin/chrome_account_manager_service_factory.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_CHROME_ACCOUNT_MANAGER_SERVICE_FACTORY_H_

ios/chrome/browser/signin/model/constants.h

@@ -0,0 +1,10 @@
+// Copyright 2014 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_CONSTANTS_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_CONSTANTS_H_
+
+#include "ios/chrome/browser/signin/constants.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_CONSTANTS_H_

ios/chrome/browser/signin/model/fake_authentication_service_delegate.h

@@ -0,0 +1,10 @@
+// Copyright 2022 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_FAKE_AUTHENTICATION_SERVICE_DELEGATE_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_FAKE_AUTHENTICATION_SERVICE_DELEGATE_H_
+
+#import "ios/chrome/browser/signin/fake_authentication_service_delegate.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_FAKE_AUTHENTICATION_SERVICE_DELEGATE_H_

ios/chrome/browser/signin/model/fake_system_identity.h

@@ -0,0 +1,10 @@
+// Copyright 2022 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_FAKE_SYSTEM_IDENTITY_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_FAKE_SYSTEM_IDENTITY_H_
+
+#include "ios/chrome/browser/signin/fake_system_identity.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_FAKE_SYSTEM_IDENTITY_H_

ios/chrome/browser/signin/model/fake_system_identity_manager.h

@@ -0,0 +1,10 @@
+// Copyright 2022 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_FAKE_SYSTEM_IDENTITY_MANAGER_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_FAKE_SYSTEM_IDENTITY_MANAGER_H_
+
+#include "ios/chrome/browser/signin/fake_system_identity_manager"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_FAKE_SYSTEM_IDENTITY_MANAGER_H_

ios/chrome/browser/signin/model/identity_manager_factory.h

@@ -0,0 +1,10 @@
+// Copyright 2017 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_IDENTITY_MANAGER_FACTORY_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_IDENTITY_MANAGER_FACTORY_H_
+
+#include "ios/chrome/browser/signin/identity_manager_factory.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_IDENTITY_MANAGER_FACTORY_H_

ios/chrome/browser/signin/model/identity_test_environment_browser_state_adaptor.h

@@ -0,0 +1,10 @@
+// Copyright 2023 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_IDENTITY_TEST_ENVIRONMENT_BROWSER_STATE_ADAPTOR_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_IDENTITY_TEST_ENVIRONMENT_BROWSER_STATE_ADAPTOR_H_
+
+#include "ios/chrome/browser/signin/identity_test_environment_browser_state_adaptor.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_IDENTITY_TEST_ENVIRONMENT_BROWSER_STATE_ADAPTOR_H_

ios/chrome/browser/signin/model/refresh_access_token_error.h

@@ -0,0 +1,10 @@
+// Copyright 2022 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_REFRESH_ACCESS_TOKEN_ERROR_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_REFRESH_ACCESS_TOKEN_ERROR_H_
+
+#include "ios/chrome/browser/signin/refresh_access_token_error.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_REFRESH_ACCESS_TOKEN_ERROR_H_

ios/chrome/browser/signin/model/signin_util.h

@@ -0,0 +1,10 @@
+// Copyright 2013 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_SIGNIN_UTIL_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_SIGNIN_UTIL_H_
+
+#include "ios/chrome/browser/signin/signin_util.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_SIGNIN_UTIL_H_

ios/chrome/browser/signin/model/system_identity.h

@@ -0,0 +1,10 @@
+// Copyright 2022 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_SYSTEM_IDENTITY_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_SYSTEM_IDENTITY_H_
+
+#include "ios/chrome/browser/signin/system_identity.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_SYSTEM_IDENTITY_H_

ios/chrome/browser/signin/model/system_identity_interaction_manager.h

@@ -0,0 +1,10 @@
+// Copyright 2022 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_SYSTEM_IDENTITY_INTERACTION_MANAGER_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_SYSTEM_IDENTITY_INTERACTION_MANAGER_H_
+
+#include "ios/chrome/browser/signin/system_identity_interaction_manager.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_SYSTEM_IDENTITY_INTERACTION_MANAGER_H_

ios/chrome/browser/signin/model/system_identity_manager.h

@@ -0,0 +1,10 @@
+// Copyright 2022 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_SYSTEM_IDENTITY_MANAGER_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_SYSTEM_IDENTITY_MANAGER_H_
+
+#include "ios/chrome/browser/signin/system_identity_manager.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_SYSTEM_IDENTITY_MANAGER_H_

ios/chrome/browser/signin/model/system_identity_manager_observer.h

@@ -0,0 +1,10 @@
+// Copyright 2022 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_SYSTEM_IDENTITY_MANAGER_OBSERVER_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_SYSTEM_IDENTITY_MANAGER_OBSERVER_H_
+
+#include "ios/chrome/browser/signin/system_identity_manager_observer.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_SYSTEM_IDENTITY_MANAGER_OBSERVER_H_

ios/chrome/browser/signin/model/trusted_vault_client_backend.h

@@ -0,0 +1,10 @@
+// Copyright 2022 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_MODEL_TRUSTED_VAULT_CLIENT_BACKEND_H_
+#define IOS_CHROME_BROWSER_SIGNIN_MODEL_TRUSTED_VAULT_CLIENT_BACKEND_H_
+
+#include "ios/chrome/browser/signin/trusted_vault_client_backend.h"
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_MODEL_TRUSTED_VAULT_CLIENT_BACKEND_H_