[Notifications] Only set defaults and vibration pattern when explicitly set.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/notifications/CustomNotificationBuilder.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/notifications/CustomNotificationBuilder.java b/chrome/android/java/src/org/chromium/chrome/browser/notifications/CustomNotificationBuilder.java
index ff3d347fc6058e975b50c9178c123adba44f6f16..e5f62083bfafbc4643debb964b396adb53222b28 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/notifications/CustomNotificationBuilder.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/notifications/CustomNotificationBuilder.java
@@ -148,11 +148,8 @@ public class CustomNotificationBuilder extends NotificationBuilderBase {
         builder.setContentIntent(mContentIntent);
         builder.setDeleteIntent(mDeleteIntent);
         builder.setPriority(mPriority);
-        // Browser channel uses silent notifications to avoid disrupting the user.
-        if (!ChannelDefinitions.CHANNEL_ID_BROWSER.equals(mChannelId)) {
-            builder.setDefaults(mDefaults);
-            builder.setVibrate(mVibratePattern);
-        }
+        builder.setDefaults(mDefaults);
+        if (mVibratePattern != null) builder.setVibrate(mVibratePattern);
         builder.setWhen(mTimestamp);
         builder.setOnlyAlertOnce(!mRenotify);
         builder.setContent(compactView);