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/object.values/implementation.js b/node_modules/object.values/implementation.js
new file mode 100644
index 0000000..dd3bc07
--- /dev/null
+++ b/node_modules/object.values/implementation.js
@@ -0,0 +1,18 @@
+'use strict';
+
+var has = require('has');
+var RequireObjectCoercible = require('es-abstract/2019/RequireObjectCoercible');
+var callBound = require('es-abstract/helpers/callBound');
+
+var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable');
+
+module.exports = function values(O) {
+	var obj = RequireObjectCoercible(O);
+	var vals = [];
+	for (var key in obj) {
+		if (has(obj, key) && $isEnumerable(obj, key)) {
+			vals.push(obj[key]);
+		}
+	}
+	return vals;
+};