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

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 c39a2e2923b11f2d48c8ce10f26bd2dd5989bca9..4a25bedae993199f1bc4afcecf9a058e8c65c20e 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
@@ -59,11 +59,8 @@ public class StandardNotificationBuilder extends NotificationBuilderBase {
             addActionToBuilder(builder, mSettingsAction);
         }
         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);
         setGroupOnBuilder(builder, mOrigin);