[ios] Fix BadgeButton's action dispatching

Bug: 976901
Change-Id: I0751d935e2aa0307bd354b888e78408810d1f195
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1746601
Commit-Queue: Chris Lu <thegreenfrog@chromium.org>
Reviewed-by: Stepan Khapugin <stkhapugin@chromium.org>
Auto-Submit: Chris Lu <thegreenfrog@chromium.org>
Cr-Commit-Position: refs/heads/master@{#686150}

ios/chrome/browser/ui/badges/badge_button_factory.mm

@@ -24,7 +24,7 @@
 - (instancetype)initWithActionHandler:(BadgeButtonActionHandler*)actionHandler {
   self = [super init];
   if (self) {
-    _actionHandler = self.actionHandler;
+    _actionHandler = actionHandler;
   }
   return self;
 }

ios/chrome/browser/ui/location_bar/location_bar_coordinator.mm

@@ -169,6 +169,8 @@ const int kLocationAuthorizationStatusCount = 5;
   // Create BadgeMediator and set the viewController as its consumer.
   if (IsInfobarUIRebootEnabled()) {
     self.badgeViewController = [[BadgeViewController alloc] init];
+    self.badgeViewController.dispatcher =
+        static_cast<id<InfobarCommands>>(self.dispatcher);
     [self.viewController addChildViewController:self.badgeViewController];
     [self.viewController setBadgeView:self.badgeViewController.view];
     [self.badgeViewController