Implementing sign-in promo histograms for bookmark

ios/chrome/browser/ui/tab_switcher/tab_switcher_panel_overlay_view.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/tab_switcher/tab_switcher_panel_overlay_view.h"
 
 #include "base/metrics/user_metrics.h"
 #include "base/metrics/user_metrics_action.h"
 #include "components/signin/core/browser/signin_metrics.h"
 #include "ios/chrome/browser/experimental_flags.h"
@@ skipping 217 matching lines @@
   [self addSubview:_signinPromoView];
   ApplyVisualConstraintsWithMetrics(
       @[ @"H:[signinPromoView(containerWidth)]" ],
       @{ @"signinPromoView" : _signinPromoView },
       @{ @"containerWidth" : @(kContainerWidth) });
   AddSameCenterXConstraint(_signinPromoView, self);
   [_signinPromoView.centerYAnchor
       constraintEqualToAnchor:self.centerYAnchor
                      constant:kContainerOriginYOffset]
       .active = YES;
-  _signinPromoViewMediator = [[SigninPromoViewMediator alloc] init];
+  _signinPromoViewMediator =
+      [[SigninPromoViewMediator alloc] initWithBrowserState:_browserState];
   _signinPromoViewMediator.accessPoint =
       signin_metrics::AccessPoint::ACCESS_POINT_RECENT_TABS;
   _signinPromoView.delegate = _signinPromoViewMediator;
   _signinPromoViewMediator.consumer = self;
   [[_signinPromoViewMediator createConfigurator]
       configureSigninPromoView:_signinPromoView];
 }
 
 - (void)updateText {
   DCHECK(_signinPromoView == nil && _signinPromoViewMediator == nil);
@@ skipping 220 matching lines @@
 
 - (void)configureSigninPromoWithConfigurator:
             (SigninPromoViewConfigurator*)configurator
                              identityChanged:(BOOL)identityChanged {
   DCHECK(_signinPromoView);
   DCHECK(_signinPromoViewMediator);
   [configurator configureSigninPromoView:_signinPromoView];
 }
 
 @end