WebUI: Disable all JS tests in MSAN, ASAN, and TSAN bots.

chrome/test/data/webui/settings/basic_page_browsertest.js

 // Copyright 2015 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.
 
 /** @fileoverview Suite of tests for the Settings basic page. */
 
 GEN_INCLUDE(['settings_page_browsertest.js']);
 
 /**
  * @constructor
  * @extends {SettingsPageBrowserTest}
  */
 function SettingsBasicPageBrowserTest() {}
 
 SettingsBasicPageBrowserTest.prototype = {
   __proto__: SettingsPageBrowserTest.prototype,
 
   /** @override */
   extraLibraries: SettingsPageBrowserTest.prototype.extraLibraries.concat([
     'test_browser_proxy.js',
   ]),
 };
 
-// Times out on debug builders and may time out on memory bots because
-// the Settings page can take several seconds to load in a Release build
-// and several times that in a Debug build. See https://crbug.com/558434.
-GEN('#if defined(MEMORY_SANITIZER) || !defined(NDEBUG)');
+// Times out on debug builders because the Settings page can take several
+// seconds to load in a Release build and several times that in a Debug build.
+// See https://crbug.com/558434.
+GEN('#if !defined(NDEBUG)');
 GEN('#define MAYBE_Load DISABLED_Load');
 GEN('#else');
 GEN('#define MAYBE_Load Load');
 GEN('#endif');
 
 TEST_F('SettingsBasicPageBrowserTest', 'MAYBE_Load', function() {
   // Assign |self| to |this| instead of binding since 'this' in suite()
   // and test() will be a Mocha 'Suite' or 'Test' instance.
   var self = this;
 
@@ skipping 137 matching lines @@
       assertNotEquals(0, page.scroller.scrollTop);
 
       settings.navigateTo(settings.Route.ABOUT);
       assertEquals(0, page.scroller.scrollTop);
     });
   });
 
   // Run all registered tests.
   mocha.run();
 });