Add a preference for disabling vibration in notifications.

chrome/android/junit/src/org/chromium/chrome/browser/notifications/NotificationPlatformBridgeTest.java

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.notifications;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 
@@ skipping 40 matching lines @@
         assertNull(NotificationPlatformBridge.getOriginFromTag(
                 "NotificationPlatformBridge;SystemDownloadNotifier;42"));
     }
 
     /**
      * Verifies that the makeDefaults method returns the generated notification defaults.
      */
     @Test
     @Feature({"Browser", "Notifications"})
     public void testMakeDefaults() throws Exception {
-        // 0 should be returned if silent is true and vibration's length is 0.
-        assertEquals(0, NotificationPlatformBridge.makeDefaults(0, true));
+        // 0 should be returned if pattern length is 0, silent is true, and vibration is enabled.
+        assertEquals(0, NotificationPlatformBridge.makeDefaults(0, true, true));
 
-        // Notification.DEFAULT_ALL should be returned if silent is false and
-        // vibration's length is 0.
-        assertEquals(Notification.DEFAULT_ALL, NotificationPlatformBridge.makeDefaults(0, false));
+        // Notification.DEFAULT_ALL should be returned if pattern length is 0, silent is false and
+        // vibration is enabled.
+        assertEquals(
+                Notification.DEFAULT_ALL, NotificationPlatformBridge.makeDefaults(0, false, true));
 
-        // Notification.DEFAULT_ALL & ~Notification.DEFAULT_VIBRATE should be returned
-        // if silent is false and vibration's length is greater than 0.
+        // Vibration should be removed from the defaults if pattern length is greater than 0, silent
+        // is false, and vibration is enabled.
         assertEquals(Notification.DEFAULT_ALL & ~Notification.DEFAULT_VIBRATE,
-                NotificationPlatformBridge.makeDefaults(10, false));
+                NotificationPlatformBridge.makeDefaults(10, false, true));
+
+        // Vibration should be removed from the defaults if pattern length is greater than 0, silent
+        // is false, and vibration is disabled.
+        assertEquals(Notification.DEFAULT_ALL & ~Notification.DEFAULT_VIBRATE,
+                NotificationPlatformBridge.makeDefaults(7, false, false));
     }
 
     /**
      * Verifies that the makeVibrationPattern method returns vibration pattern used
      * in Android notification.
      */
     @Test
     @Feature({"Browser", "Notifications"})
     public void testMakeVibrationPattern() throws Exception {
         assertTrue(Arrays.equals(new long[] {0, 100, 200, 300},
                 NotificationPlatformBridge.makeVibrationPattern(new int[] {100, 200, 300})));
     }
 }