[Android O] Refactor channel initialization

chrome/android/java/src/org/chromium/chrome/browser/notifications/StandardNotificationBuilder.java

Index: chrome/android/java/src/org/chromium/chrome/browser/notifications/StandardNotificationBuilder.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/notifications/StandardNotificationBuilder.java b/chrome/android/java/src/org/chromium/chrome/browser/notifications/StandardNotificationBuilder.java
index dbda58219edcfe9a96dcc4349520e03e82127550..9cb36919109dc21a19a7f870f85fa82ac04a0777 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/notifications/StandardNotificationBuilder.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/notifications/StandardNotificationBuilder.java
@@ -25,13 +25,8 @@ public class StandardNotificationBuilder extends NotificationBuilderBase {
         // API level of methods you call on the builder.
         // TODO(crbug.com/697104) We should probably use a Compat builder.
         ChromeNotificationBuilder builder =
-                NotificationBuilderFactory.createChromeNotificationBuilder(false /* preferCompat */,
-                        NotificationConstants.CHANNEL_ID_SITES,
-                        mContext.getString(
-                                org.chromium.chrome.R.string.notification_category_sites),
-                        NotificationConstants.CHANNEL_GROUP_ID_GENERAL,
-                        mContext.getString(
-                                org.chromium.chrome.R.string.notification_category_group_general));
+                NotificationBuilderFactory.createChromeNotificationBuilder(
+                        false /* preferCompat */, ChannelsInitializer.CHANNEL_ID_SITES);
 
         builder.setContentTitle(mTitle);
         builder.setContentText(mBody);