[PointerLock] Add null check before dispatching click event

third_party/WebKit/LayoutTests/resources/testharnessreport.js

 /*
  * THIS FILE INTENTIONALLY LEFT BLANK
  *
  * More specifically, this file is intended for vendors to implement
  * code needed to integrate testharness.js tests with their own test systems.
  *
  * Typically such integration will attach callbacks when each test is
  * has run, using add_result_callback(callback(test)), or when the whole test file has
  * completed, using add_completion_callback(callback(tests, harness_status)).
  *
@@ skipping 99 matching lines @@
             var script = document.createElement('script');
             script.src = automationPath + relativePath;
             document.head.appendChild(script);
         }
 
         var src;
         if (pathAndBase.startsWith('/fullscreen/')) {
             // Fullscreen tests all use the same automation script.
             src = automationPath + '/fullscreen/auto-click.js';
         } else if (pathAndBase.startsWith('/pointerevents/')
-                   || pathAndBase.startsWith('/uievents/')) {
+                   || pathAndBase.startsWith('/uievents/')
+                   || pathAndBase.startsWith('/pointerlock/')) {
             // Per-test automation scripts.
             src = automationPath + pathAndBase + '-automation.js';
         } else {
             return;
         }
         var script = document.createElement('script');
         script.src = src;
         document.head.appendChild(script);
     }
 
@@ skipping 129 matching lines @@
             // another completion callback might generate more results.  So, we
             // don't dump the results immediately.
             setTimeout(done, 0);
         } else {
             // Parsing the test HTML isn't finished yet.
             window.addEventListener('load', done);
         }
     });
 
 })();