Revert of Deprecate native and extension notification delegates.

chrome/browser/extensions/api/notifications/extension_notification_handler.cc

 // Copyright 2017 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/extensions/api/notifications/extension_notification_handler.h"
 
 #include "base/logging.h"
-#include "base/metrics/histogram_macros.h"
 #include "base/strings/nullable_string16.h"
 #include "base/strings/string_piece.h"
 #include "chrome/browser/extensions/api/notifications/extension_notification_display_helper.h"
 #include "chrome/browser/extensions/api/notifications/extension_notification_display_helper_factory.h"
-#include "chrome/browser/notifications/notification_common.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/extensions/api/notifications.h"
-#include "chrome/common/features.h"
-#include "extensions/browser/app_window/app_window.h"
-#include "extensions/browser/app_window/app_window_registry.h"
-#include "extensions/browser/app_window/native_app_window.h"
 #include "extensions/common/constants.h"
-#include "ui/message_center/notifier_settings.h"
 #include "url/gurl.h"
 
 namespace extensions {
 
-namespace notifications = api::notifications;
-
-const base::Feature kAllowFullscreenAppNotificationsFeature{
-    "FSNotificationsApp", base::FEATURE_ENABLED_BY_DEFAULT};
-
 namespace {
 
 std::string GetExtensionId(const std::string& extension_url) {
   GURL url(extension_url);
   if (!url.is_valid() || !url.SchemeIs(extensions::kExtensionScheme))
     return "";
   return url.GetOrigin().host_piece().as_string();
 }
 
 std::unique_ptr<base::ListValue> CreateBaseEventArgs(
@@ skipping 63 matching lines @@
 
   SendEvent(profile, extension_id, histogram_value, event_name,
             EventRouter::USER_GESTURE_ENABLED, std::move(args));
 }
 
 void ExtensionNotificationHandler::OpenSettings(Profile* profile) {
   // Extension notifications don't display a settings button.
   NOTREACHED();
 }
 
-// Should only display when fullscreen if this app is the source of the
-// fullscreen window.
-bool ExtensionNotificationHandler::ShouldDisplayOnFullScreen(
-    Profile* profile,
-    const std::string& origin) {
-  DCHECK(profile);
-  DCHECK(!GetExtensionId(origin).empty());
-  AppWindowRegistry::AppWindowList windows =
-      AppWindowRegistry::Get(profile)->GetAppWindowsForApp(
-          GetExtensionId(origin));
-  for (auto* window : windows) {
-    // Window must be fullscreen and visible
-    if (window->IsFullscreen() && window->GetBaseWindow()->IsActive()) {
-      bool enabled =
-          base::FeatureList::IsEnabled(kAllowFullscreenAppNotificationsFeature);
-      if (enabled) {
-        UMA_HISTOGRAM_ENUMERATION("Notifications.Display_Fullscreen.Shown",
-                                  message_center::NotifierId::APPLICATION,
-                                  message_center::NotifierId::SIZE);
-      } else {
-        UMA_HISTOGRAM_ENUMERATION("Notifications.Display_Fullscreen.Suppressed",
-                                  message_center::NotifierId::APPLICATION,
-                                  message_center::NotifierId::SIZE);
-      }
-      return enabled;
-    }
-  }
-
-  return false;
-}
-
 void ExtensionNotificationHandler::SendEvent(
     Profile* profile,
     const std::string& extension_id,
     events::HistogramValue histogram_value,
     const std::string& event_name,
     EventRouter::UserGestureState user_gesture,
     std::unique_ptr<base::ListValue> args) {
   if (extension_id.empty())
     return;
 
   EventRouter* event_router = EventRouter::Get(profile);
   if (!event_router)
     return;
 
   std::unique_ptr<Event> event(
       new Event(histogram_value, event_name, std::move(args)));
   event->user_gesture = user_gesture;
   event_router->DispatchEventToExtension(extension_id, std::move(event));
 }
 
 }  // namespace extensions