Implement the ability to close alerts programatically

chrome/browser/ui/cocoa/notifications/alert_notification_service.mm

Index: chrome/browser/ui/cocoa/notifications/alert_notification_service.mm
diff --git a/chrome/browser/ui/cocoa/notifications/alert_notification_service.mm b/chrome/browser/ui/cocoa/notifications/alert_notification_service.mm
index 522d42a935ba63e658ac3f69f2299258903fec4f..466bd1ab83e041551083da4fe493809d42668a6a 100644
--- a/chrome/browser/ui/cocoa/notifications/alert_notification_service.mm
+++ b/chrome/browser/ui/cocoa/notifications/alert_notification_service.mm
@@ -6,6 +6,7 @@
 
 #import "base/mac/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/notifications/notification_builder_mac.h"
+#include "chrome/browser/ui/cocoa/notifications/notification_constants_mac.h"
 
 @class NSUserNotificationCenter;
 
@@ -21,4 +22,28 @@
       deliverNotification:toast];
 }
 
+- (void)closeNotification:(NSString*)notificationId
+              withProfile:(NSString*)profileId {
+  NSUserNotificationCenter* notificationCenter =
+      [NSUserNotificationCenter defaultUserNotificationCenter];
+  for (NSUserNotification* candidate in
+       [notificationCenter deliveredNotifications]) {
+    NSString* candidateId = [candidate.userInfo
+        objectForKey:notification_constants::kNotificationId];
+
+    NSString* candidateProfileId = [candidate.userInfo
+        objectForKey:notification_constants::kNotificationProfileId];
+
+    if ([candidateId isEqualToString:notificationId] &&
+        [profileId isEqualToString:candidateProfileId]) {
+      [notificationCenter removeDeliveredNotification:candidate];
+    }
+  }
+}
+
+- (void)closeAllNotifications {
+  [[NSUserNotificationCenter defaultUserNotificationCenter]
+      removeAllDeliveredNotifications];
+}
+
 @end