Refactor NotificationPlatformBridgeLinux

chrome/browser/notifications/stub_notification_platform_bridge.cc

Index: chrome/browser/notifications/stub_notification_platform_bridge.cc
diff --git a/chrome/browser/notifications/stub_notification_platform_bridge.cc b/chrome/browser/notifications/stub_notification_platform_bridge.cc
index 639536ed51f9963ead62865e7a63d75d315c49c7..78ab55c9eeb978ddd7956c66065c7b70ff681949 100644
--- a/chrome/browser/notifications/stub_notification_platform_bridge.cc
+++ b/chrome/browser/notifications/stub_notification_platform_bridge.cc
@@ -72,3 +72,8 @@ void StubNotificationPlatformBridge::GetDisplayed(
       base::BindOnce(callback, base::Passed(&displayed_notifications),
                      true /* supports_synchronization */));
 }
+
+void StubNotificationPlatformBridge::SetReadyCallback(
+    NotificationBridgeReadyCallback callback) {
+  std::move(callback).Run(true);
+}