Add cr.exportPath() to ESLint banned properties

R=dpapad@chromium.org

Bug: 1028829
Change-Id: I6ff5518a178bd86a5ab13b8ef7d8bce52b9588fd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1995947
Commit-Queue: Dan Beam <dbeam@chromium.org>
Auto-Submit: Dan Beam <dbeam@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#730348}

.eslintrc.js

@@ -44,6 +44,11 @@ module.exports = {
         'property': '__defineSetter__',
         'message': 'Use Object.defineProperty',
       },
+      {
+        'object': 'cr',
+        'property': 'exportPath',
+        'message': 'Use ES modules or cr.define() instead',
+      },
     ],
     'no-var': 'error',
     'prefer-const': 'error',