Introduce a new API to handle native notification clicks

chrome/browser/notifications/non_persistent_notification_handler.cc

+// 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.
+
+#include "chrome/browser/notifications/non_persistent_notification_handler.h"
+
+#include "chrome/browser/notifications/notification_delegate.h"
+#include "chrome/browser/notifications/platform_notification_service_impl.h"
+
+NonPersistentNotificationHandler::NonPersistentNotificationHandler() {}
+NonPersistentNotificationHandler::~NonPersistentNotificationHandler() {}
+
+void NonPersistentNotificationHandler::OnClose(
+    Profile* profile,
+    const std::string& origin,
+    const std::string& notification_id,
+    bool by_user) {
+  if (notifications_.find(notification_id) != notifications_.end()) {
+    notifications_[notification_id]->Close(by_user);
+    notifications_.erase(notification_id);
+  }
+}
+
+void NonPersistentNotificationHandler::OnClick(
+    Profile* profile,
+    const std::string& origin,
+    const std::string& notification_id,
+    int action_index) {
+  // Buttons not supported for non persistent notifications.
+  DCHECK_EQ(action_index, -1);
+  if (notifications_.find(notification_id) != notifications_.end()) {
+    notifications_[notification_id]->Click();
+  }
+}
+
+void NonPersistentNotificationHandler::OpenSettings(Profile* profile) {
+  NotificationCommon::OpenNotificationSettings(profile);
+}
+
+void NonPersistentNotificationHandler::RegisterNotification(
+    const std::string& notification_id,
+    NotificationDelegate* delegate) {
+  DCHECK_EQ(notifications_.count(notification_id), 0u);
+  notifications_[notification_id] =
+      scoped_refptr<NotificationDelegate>(delegate);
+}