Add eslint-import-plugin to node_modules

Will be used to make sure no default exports are in DevTools.

The PRESUBMIT.py has been updated to skip running the formatting check
if node_modules files are affected, to workaround crbug.com/1068198.

DISABLE_THIRD_PARTY_CHECK=Add plugin to node_modules

Bug: 1068198
Change-Id: I04d4dc813daa01099f21d40edf47aaefcc0b045f
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2135610
Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
Auto-Submit: Tim van der Lippe <tvanderlippe@chromium.org>
Reviewed-by: Jack Franklin <jacktfranklin@chromium.org>
diff --git a/node_modules/array-includes/index.js b/node_modules/array-includes/index.js
new file mode 100644
index 0000000..5aaa502
--- /dev/null
+++ b/node_modules/array-includes/index.js
@@ -0,0 +1,26 @@
+'use strict';
+
+var define = require('define-properties');
+var RequireObjectCoercible = require('es-abstract/2018/RequireObjectCoercible');
+var callBound = require('es-abstract/helpers/callBound');
+
+var implementation = require('./implementation');
+var getPolyfill = require('./polyfill');
+var polyfill = getPolyfill();
+var shim = require('./shim');
+
+var $slice = callBound('Array.prototype.slice');
+
+/* eslint-disable no-unused-vars */
+var boundIncludesShim = function includes(array, searchElement) {
+/* eslint-enable no-unused-vars */
+	RequireObjectCoercible(array);
+	return polyfill.apply(array, $slice(arguments, 1));
+};
+define(boundIncludesShim, {
+	getPolyfill: getPolyfill,
+	implementation: implementation,
+	shim: shim
+});
+
+module.exports = boundIncludesShim;