[iOS][Password-Breach] Stop the cordinator on dismiss.

Create PasswordBreachPresenter protocol so the mediator can stop the
feature when done.

Bug: 1008862
Change-Id: I460d175c910909cdd6e55abee109f6705f508dc5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1845001Reviewed-by: Stepan Khapugin <stkhapugin@chromium.org>
Commit-Queue: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#703297}

ios/chrome/browser/ui/passwords/password_breach_coordinator.mm

@@ -13,7 +13,8 @@
 #error "This file requires ARC support."
 #endif
 
-@interface PasswordBreachCoordinator () <PasswordBreachCommands>
+@interface PasswordBreachCoordinator () <PasswordBreachCommands,
+                                         PasswordBreachPresenter>
 
 // The main view controller for this coordinator.
 @property(nonatomic, strong) PasswordBreachViewController* viewController;
@@ -63,6 +64,7 @@
   self.viewController = [[PasswordBreachViewController alloc] init];
   self.mediator =
       [[PasswordBreachMediator alloc] initWithConsumer:self.viewController
+                                             presenter:self
                                                    URL:URL
                                               leakType:leakType];
   self.viewController.actionHandler = self.mediator;

ios/chrome/browser/ui/passwords/password_breach_mediator.h

@@ -14,10 +14,19 @@ class GURL;
 
 @protocol PasswordBreachConsumer;
 
+// Object presenting the feature.
+@protocol PasswordBreachPresenter <NSObject>
+
+// Informs the presenter that the feature should dismiss.
+- (void)stop;
+
+@end
+
 // Manages the state and interactions of the consumer.
 @interface PasswordBreachMediator : NSObject <PasswordBreachActionHandler>
 
 - (instancetype)initWithConsumer:(id<PasswordBreachConsumer>)consumer
+                       presenter:(id<PasswordBreachPresenter>)presenter
                              URL:(const GURL&)URL
                         leakType:(password_manager::CredentialLeakType)leakType;
 

ios/chrome/browser/ui/passwords/password_breach_mediator.mm

@@ -20,13 +20,22 @@ using password_manager::GetDescription;
 using password_manager::GetTitle;
 using password_manager::ShouldCheckPasswords;
 
+@interface PasswordBreachMediator ()
+
+// The presenter of the feature.
+@property(nonatomic, weak) id<PasswordBreachPresenter> presenter;
+
+@end
+
 @implementation PasswordBreachMediator
 
 - (instancetype)initWithConsumer:(id<PasswordBreachConsumer>)consumer
+                       presenter:(id<PasswordBreachPresenter>)presenter
                              URL:(const GURL&)URL
                         leakType:(CredentialLeakType)leakType {
   self = [super init];
   if (self) {
+    _presenter = presenter;
     NSString* subtitle = SysUTF16ToNSString(GetDescription(leakType, URL));
     NSString* primaryActionString =
         SysUTF16ToNSString(GetAcceptButtonLabel(leakType));
@@ -41,7 +50,7 @@ using password_manager::ShouldCheckPasswords;
 #pragma mark - PasswordBreachConsumerDelegate
 
 - (void)passwordBreachDone {
-  // TODO(crbug.com/1008862): Hook up with the coordinator to stop it.
+  [self.presenter stop];
 }
 
 - (void)passwordBreachPrimaryAction {