Add an XPC service to handle alert notifications on mac

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

+// Copyright 2016 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 <AppKit/AppKit.h>
+
+#import "chrome/browser/ui/cocoa/notifications/notification_service_delegate.h"
+
+#include "base/mac/scoped_nsobject.h"
+#import "chrome/browser/ui/cocoa/notifications/alert_notification_service.h"
+#import "chrome/browser/ui/cocoa/notifications/notification_delivery.h"
+#import "chrome/browser/ui/cocoa/notifications/notification_response_builder_mac.h"
+
+@class NSUserNotificationCenter;
+
+@implementation ServiceDelegate
+
+@synthesize connection = connection_;
+
+- (instancetype)init {
+  if (self = [super init]) {

[Robert Sesek, 2016/10/04 16:04:25]

nit: two sets of parens is convention to silence assignment warnings, i.e., |if
((self = [super init])) {|.

+    [[NSUserNotificationCenter defaultUserNotificationCenter] setDelegate:self];
+  }
+  return self;
+}
+
+- (void)dealloc {
+  [[NSUserNotificationCenter defaultUserNotificationCenter] setDelegate:nil];
+  [super dealloc];
+}
+
+- (BOOL)listener:(NSXPCListener*)listener
+    shouldAcceptNewConnection:(NSXPCConnection*)newConnection {
+  newConnection.exportedInterface =
+      [NSXPCInterface interfaceWithProtocol:@protocol(NotificationDelivery)];
+  [newConnection.exportedInterface
+         setClasses:[NSSet setWithObjects:[NSDictionary class], [NSImage class],
+                                          [NSNumber class], [NSString class],
+                                          nil]
+        forSelector:@selector(deliverNotification:)
+      argumentIndex:0
+            ofReply:NO];
+
+  base::scoped_nsobject<AlertNotificationService> object(
+      [[AlertNotificationService alloc] init]);
+  newConnection.exportedObject = object.get();
+  newConnection.remoteObjectInterface =
+      [NSXPCInterface interfaceWithProtocol:@protocol(NotificationReply)];
+  connection_ = newConnection;
+  [newConnection resume];
+
+  return YES;
+}
+
+// NSUserNotification center delegate
+- (void)userNotificationCenter:(NSUserNotificationCenter*)center
+       didActivateNotification:(NSUserNotification*)notification {
+  NSDictionary* response =
+      [NotificationResponseBuilder buildDictionary:notification];
+  [[connection_ remoteObjectProxy] notificationClick:response];
+}
+
+@end