New Sync datatype for Synced Notifications App Info

sync/protocol/synced_notification_app_info_specifics.proto

+// Copyright 2014 Google Inc. All Rights Reserved.
+//
+// Sync protocol datatype extension for appInfo objects.
+
+syntax = "proto2";
+
+option optimize_for = LITE_RUNTIME;
+option retain_unknown_fields = true;
+
+package sync_pb;
+
+import "synced_notification_render.proto";
+
+message SyncedNotificationAppInfoSpecifics {
+  // Information of the list of apps we know about.
+  // NOTE: This may not be the comprehensive list of apps that send
+  // notifications. At best, it will contain all the first party apps and
+  // paging support is not needed.
+  // This is a static list sent from the server that is read only on the client.
+  repeated SyncedNotificationAppInfo synced_notification_app_info = 1;
+}
+
+message SyncedNotificationAppInfo {
+  // The application ID of a subservice within the notification sending service.
+  repeated string app_id = 1;
+
+  // The name to use in the settings screen for this app.
+  optional string settings_display_name = 2;
+
+  // The icon to use. The URL of the icon may point to a
+  // hi-res image, so clients should always size the image to the
+  // preferred width and height specified in the Image proto.
+  optional SyncedNotificationImage icon = 3;
+}