Implementing sign-in promo histograms for bookmark

ios/chrome/browser/ui/settings/settings_collection_view_controller.mm

 // 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.
 
 #import "ios/chrome/browser/ui/settings/settings_collection_view_controller.h"
 
 #include <memory>
 
 #import "base/mac/foundation_util.h"
 #include "base/metrics/user_metrics.h"
@@ skipping 318 matching lines @@
       AuthenticationServiceFactory::GetForBrowserState(_mainBrowserState);
   if (!authService->IsAuthenticated()) {
     if (!_hasRecordedSigninImpression) {
       // Once the Settings are open, this button impression will at most be
       // recorded once until they are closed.
       base::RecordAction(
           base::UserMetricsAction("Signin_Impression_FromSettings"));
       _hasRecordedSigninImpression = YES;
     }
     if (experimental_flags::IsSigninPromoEnabled()) {
-      _signinPromoViewMediator = [[SigninPromoViewMediator alloc] init];
+      _signinPromoViewMediator = [[SigninPromoViewMediator alloc]
+          initWithBrowserState:_currentBrowserState];
       _signinPromoViewMediator.consumer = self;
     }
     [model addItem:[self signInTextItem]
         toSectionWithIdentifier:SectionIdentifierSignIn];
   } else {
     _signinPromoViewMediator = nil;
     [model addItem:[self accountCellItem]
         toSectionWithIdentifier:SectionIdentifierSignIn];
   }
 
@@ skipping 849 matching lines @@
     (SigninPromoView*)signinPromoView {
   DCHECK(_signinPromoViewMediator.defaultIdentity);
   base::RecordAction(
       base::UserMetricsAction("Signin_SigninNotDefault_FromSettings"));
   [self showSignInWithIdentity:nil
                    promoAction:signin_metrics::PromoAction::
                                    PROMO_ACTION_NOT_DEFAULT];
 }
 
 @end