Bug 1533391 - Lint Debugger on try. r=davidwalsh

Differential Revision: https://phabricator.services.mozilla.com/D22503

--HG--
extra : moz-landing-system : lando

devtools/client/debugger/new/src/components/SecondaryPanes/Scopes.css

@@ -2,8 +2,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
 
-
-
 .scopes-content .toggle-map-scopes {
   border-bottom: 1px solid var(--theme-splitter-color);
   margin-bottom: 3px;

devtools/client/debugger/new/src/utils/editor/index.js

@@ -165,7 +165,7 @@ export function getLocationsInViewport({ codeMirror }: Object) {
   if (!codeMirror) {
     return {
       start: { line: 0, column: 0 },
-      end: { line: 0, column: 0 },
+      end: { line: 0, column: 0 }
     };
   }
   const charWidth = codeMirror.defaultCharWidth();

taskcluster/ci/source-test/node.yml

@@ -13,10 +13,13 @@ debugger-tests:
         using: run-task
         cache-dotcache: true
         command: >
+            cd /builds/worker/checkouts/gecko/ &&
+            npm install &&
             cd /builds/worker/checkouts/gecko/devtools/client/debugger/new/ &&
             yarn &&
             yarn flow &&
-            yarn test
+            yarn test &&
+            yarn lint
     when:
         files-changed:
             - 'devtools/client/debugger/new/**'