Adding mediator for Sign-in promo

ios/chrome/browser/ui/authentication/BUILD.gn

 # Copyright 2016 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.
 
 bundle_data("resources") {
   sources = [
     "resources/signin_confirmation_more.png",
     "resources/signin_confirmation_more@2x.png",
     "resources/signin_confirmation_more@3x.png",
   ]
@@ skipping 19 matching lines @@
     "signed_in_accounts_view_controller.mm",
     "signin_account_selector_view_controller.h",
     "signin_account_selector_view_controller.mm",
     "signin_confirmation_view_controller.h",
     "signin_confirmation_view_controller.mm",
     "signin_interaction_controller.h",
     "signin_interaction_controller.mm",
   ]
   deps = [
     ":authentication_arc",
+    ":authentication_ui",
     ":resources",
     "//base",
     "//components/google/core/browser",
     "//components/infobars/core",
     "//components/prefs",
     "//components/signin/core/browser",
     "//components/signin/core/common",
     "//components/signin/ios/browser",
     "//components/strings",
     "//google_apis",
@@ skipping 26 matching lines @@
   libs = [
     "CoreGraphics.framework",
     "QuartzCore.framework",
     "UIKit.framework",
   ]
 }
 
 source_set("authentication_arc") {
   configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
+    "resized_avatar_cache.h",
+    "resized_avatar_cache.mm",
+    "signin_promo_view_mediator.h",
+    "signin_promo_view_mediator.mm",
+  ]
+  deps = [
+    ":authentication_ui",
+    "//base",
+    "//ios/chrome/app/strings",
+    "//ios/chrome/browser/ui",
+    "//ios/public/provider/chrome/browser",
+    "//ios/public/provider/chrome/browser/signin",
+    "//ios/third_party/material_components_ios",
+    "//ui/base",
+  ]
+  libs = [ "UIKit.framework" ]
+}
+
+source_set("authentication_ui") {
+  configs += [ "//build/config/compiler:enable_arc" ]
+  sources = [
     "account_control_item.h",
     "account_control_item.mm",
-    "resized_avatar_cache.h",
-    "resized_avatar_cache.mm",
+    "signin_promo_item.h",
+    "signin_promo_item.mm",
+    "signin_promo_view.h",
+    "signin_promo_view.mm",
   ]
   deps = [
+    "//base",
+    "//ios/chrome/app/strings",
     "//ios/chrome/browser/ui",
     "//ios/chrome/browser/ui/collection_view/cells",
     "//ios/chrome/browser/ui/colors",
     "//ios/public/provider/chrome/browser",
-    "//ios/public/provider/chrome/browser/signin",
+    "//ui/base",
   ]
-  libs = [
-    "CoreGraphics.framework",
-    "QuartzCore.framework",
-    "UIKit.framework",
-  ]
+  libs = [ "UIKit.framework" ]
 }
 
 source_set("unit_tests") {
   configs += [ "//build/config/compiler:enable_arc" ]
   testonly = true
   sources = [
     "account_control_item_unittest.mm",
     "authentication_flow_unittest.mm",
     "re_signin_infobar_delegate_unittest.mm",
     "signed_in_accounts_view_controller_unittest.mm",
+    "signin_promo_item_unittest.mm",
+    "signin_promo_view_mediator_unittest.mm",
+    "signin_promo_view_unittest.mm",
   ]
   deps = [
     ":authentication",
     ":authentication_arc",
+    ":authentication_ui",
     "//base",
     "//base/test:test_support",
     "//components/pref_registry",
     "//components/sync_preferences",
     "//components/sync_preferences:test_support",
     "//ios/chrome/browser/browser_state:test_support",
     "//ios/chrome/browser/infobars",
     "//ios/chrome/browser/prefs:browser_prefs",
     "//ios/chrome/browser/signin",
     "//ios/chrome/browser/signin:test_support",
@@ skipping 28 matching lines @@
     "//ios/chrome/browser/ui/tools_menu",
     "//ios/chrome/test/app:test_support",
     "//ios/chrome/test/earl_grey:test_support",
     "//ios/public/provider/chrome/browser/signin:test_support",
     "//ios/testing:ios_test_support",
     "//ios/testing/earl_grey:earl_grey_support",
     "//ios/third_party/earl_grey",
   ]
   libs = [ "XCTest.framework" ]
 }