Disable browser_tests:PluginsTest.Plugins due to frequent failures.

chrome/test/data/webui/plugins_browsertest.js

 // 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.
 
 /**
  * @fileoverview Tests for chrome://plugins
  */
 
 /** @const {string} Path to source root. */
 var ROOT_PATH = '../../../../';
@@ skipping 95 matching lines @@
               var stub = connection.bindHandleToStub(
                   handle, pluginsMojom.PluginsPageHandler);
               this.browserProxy = new TestBrowserProxy();
               bindings.StubBindings(stub).delegate = this.browserProxy;
             }.bind(this));
       }.bind(this));
     }.bind(this);
   },
 };
 
-TEST_F('PluginsTest', 'Plugins', function() {
+TEST_F('PluginsTest', 'DISABLED_Plugins', function() {
   var browserProxy = this.browserProxy;
 
   var fakePluginData = {
     name: 'Group Name',
     description: 'description',
     version: 'version',
     update_url: 'http://update/',
     critical: true,
     enabled_mode: 'enabledByUser',
     id: 'plugin-name',
@@ skipping 71 matching lines @@
             return browserProxy.whenCalled('saveShowDetailsToPrefs');
           }).then(function(expanded) {
             assertFalse(Boolean(expanded));
           });
     });
   });
 
   // Run all registered tests.
   mocha.run();
 });