Remove navigator.vibrate without user gesture.

third_party/WebKit/LayoutTests/vibration/vibration.html

Index: third_party/WebKit/LayoutTests/vibration/vibration.html
diff --git a/third_party/WebKit/LayoutTests/vibration/vibration.html b/third_party/WebKit/LayoutTests/vibration/vibration.html
index 1dfcde4e5c3ecec5805f1eb368d1f31e11daad9e..86ab80c55aeefeec24f37fd825c65140e0e00198 100644
--- a/third_party/WebKit/LayoutTests/vibration/vibration.html
+++ b/third_party/WebKit/LayoutTests/vibration/vibration.html
@@ -2,7 +2,10 @@
 <script src="../resources/testharness.js"></script>
 <script src="../resources/testharnessreport.js"></script>
 <script src="../resources/mojo-helpers.js"></script>
+<script src="../resources/user-gesture-utils.js"></script>
 <script src="resources/vibration-helpers.js"></script>
+<script src="vibration-utils.js"></script>
+<h4 id="test"></h4>
 <script>
 
 'use strict';
@@ -10,6 +13,10 @@
 if (!window.testRunner)
   debug('This test cannot be run without the TestRunner');
 
+// Simulates a user click for vibrate to be allowed.
+// See: https://www.chromestatus.com/feature/5644273861001216.
+simulateUserClick("test");
+
 vibration_test(vibration => {
   assert_true(vibration instanceof Object);
   assert_true(vibration.mockVibrationManager instanceof Object);