[iOS] Remove unused class SigninInteractionControllerAppInterface.

Part of the cleanup effort to fully support the new sign-in
architecture.

Bug: 971989
Change-Id: Iddc3e58ecb08cb0bc7bbd4f74f9bc3e5af3f650c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2251922Reviewed-by: Jérôme Lebel <jlebel@chromium.org>
Commit-Queue: Nohemi Fernandez <fernandex@chromium.org>
Cr-Commit-Position: refs/heads/master@{#780216}

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

@@ -7,8 +7,6 @@ source_set("eg_test_support") {
   configs += [ "//build/config/compiler:enable_arc" ]
   testonly = true
   sources = [
-    "signin_interaction_controller_app_interface.h",
-    "signin_interaction_controller_app_interface.mm",
     "signin_interaction_controller_egtest_util.h",
     "signin_interaction_controller_egtest_util.mm",
   ]
@@ -31,7 +29,6 @@ source_set("eg_test_support+eg2") {
   ]
   testonly = true
   sources = [
-    "signin_interaction_controller_app_interface.h",
     "signin_interaction_controller_egtest_util.h",
     "signin_interaction_controller_egtest_util.mm",
   ]
@@ -46,17 +43,3 @@ source_set("eg_test_support+eg2") {
     "//ios/third_party/earl_grey2:test_lib",
   ]
 }
-
-source_set("eg_app_support+eg2") {
-  defines = [ "CHROME_EARL_GREY_2" ]
-  configs += [ "//build/config/compiler:enable_arc" ]
-  testonly = true
-  sources = [
-    "signin_interaction_controller_app_interface.h",
-    "signin_interaction_controller_app_interface.mm",
-  ]
-  deps = [
-    "//base",
-    "//ios/chrome/browser/ui/authentication",
-  ]
-}

ios/chrome/browser/ui/signin_interaction/signin_interaction_controller_app_interface.h

-// Copyright 2019 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.
-
-#ifndef IOS_CHROME_BROWSER_UI_SIGNIN_INTERACTION_SIGNIN_INTERACTION_CONTROLLER_APP_INTERFACE_H_
-#define IOS_CHROME_BROWSER_UI_SIGNIN_INTERACTION_SIGNIN_INTERACTION_CONTROLLER_APP_INTERFACE_H_
-
-#import <Foundation/Foundation.h>
-
-// The app interface for Sign-in interaction controller tests.
-@interface SigninInteractionControllerAppInterface : NSObject
-
-// If |shown| is set to NO, activity indicator is not visible while sign-in is
-// in progress.
-+ (void)setActivityIndicatorShown:(BOOL)shown;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_SIGNIN_INTERACTION_SIGNIN_INTERACTION_CONTROLLER_APP_INTERFACE_H_

ios/chrome/browser/ui/signin_interaction/signin_interaction_controller_app_interface.mm

-// Copyright 2019 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.
-
-#import "ios/chrome/browser/ui/signin_interaction/signin_interaction_controller_app_interface.h"
-
-#include "ios/chrome/browser/ui/authentication/chrome_signin_view_controller.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-@implementation SigninInteractionControllerAppInterface
-
-+ (void)setActivityIndicatorShown:(BOOL)shown {
-  [ChromeSigninViewController setActivityIndicatorShownForTesting:shown];
-}
-
-@end

ios/chrome/test/earl_grey/BUILD.gn

@@ -467,7 +467,6 @@ source_set("eg_app_support+eg2") {
     "//ios/chrome/browser/ui/settings/password:password_constants",
     "//ios/chrome/browser/ui/settings/privacy:privacy_ui",
     "//ios/chrome/browser/ui/settings/sync",
-    "//ios/chrome/browser/ui/signin_interaction:eg_app_support+eg2",
     "//ios/chrome/browser/ui/tab_grid:tab_grid_ui_constants",
     "//ios/chrome/browser/ui/tab_grid/grid:grid_ui_constants",
     "//ios/chrome/browser/ui/table_view:feature_flags",