Implementing sign-in promo histograms for bookmark

ios/chrome/browser/ui/authentication/signin_promo_view_mediator_unittest.mm

 // Copyright 2017 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/authentication/signin_promo_view_mediator.h"
 
 #include "base/run_loop.h"
 #import "base/test/ios/wait_util.h"
 #import "ios/chrome/browser/ui/authentication/signin_promo_view.h"
 #import "ios/chrome/browser/ui/authentication/signin_promo_view_configurator.h"
 #import "ios/chrome/browser/ui/authentication/signin_promo_view_consumer.h"
 #import "ios/public/provider/chrome/browser/signin/fake_chrome_identity.h"
 #import "ios/public/provider/chrome/browser/signin/fake_chrome_identity_service.h"
 #import "ios/third_party/material_components_ios/src/components/Buttons/src/MaterialButtons.h"
 #import "testing/platform_test.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 #include "third_party/ocmock/gtest_support.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace {
 
 class SigninPromoViewMediatorTest : public PlatformTest {
  protected:
   void SetUp() override {
     consumer_ = OCMStrictProtocolMock(@protocol(SigninPromoViewConsumer));
-    mediator_ = [[SigninPromoViewMediator alloc] init];
+    mediator_ = [[SigninPromoViewMediator alloc] initWithBrowserState:nil];
     mediator_.consumer = consumer_;
 
     signin_promo_view_ = OCMStrictClassMock([SigninPromoView class]);
     primary_button_ = OCMStrictClassMock([MDCFlatButton class]);
     OCMStub([signin_promo_view_ primaryButton]).andReturn(primary_button_);
     secondary_button_ = OCMStrictClassMock([MDCFlatButton class]);
     OCMStub([signin_promo_view_ secondaryButton]).andReturn(secondary_button_);
   }
 
   void TearDown() override {
@@ skipping 158 matching lines @@
   CheckWarmStateConfigurator(configurator_);
   ExpectConfiguratorNotification(YES);
   ios::FakeChromeIdentityService::GetInstanceFromChromeProvider()
       ->RemoveIdentity(expected_default_dentity_);
   expected_default_dentity_ = nil;
   TestColdState();
   CheckColdStateConfigurator(configurator_);
 }
 
 }  // namespace