Add thenable ajax calls.

app/assets/javascripts/api.js

@@ -99,15 +99,13 @@ const Api = {
   commitMultiple(id, data, callback) {
     const url = Api.buildUrl(Api.commitPath)
       .replace(':id', id);
-    return $.ajax({
+    return this.wrapAjaxCall({
       url,
       type: 'POST',
       contentType: 'application/json; charset=utf-8',
       data: JSON.stringify(data),
       dataType: 'json',
-    })
-      .done(commitData => callback(commitData))
-      .fail(message => callback(message.responseJSON));
+    });
   },
 
   // Return text for a specific license

app/assets/javascripts/repo/components/repo_commit_section.vue

@@ -42,10 +42,11 @@ export default {
         actions,
       };
       Store.submitCommitsLoading = true;
-      Service.commitFiles(payload, this.resetCommitState);
+      Service.commitFiles(payload)
+      .then(this.resetCommitState);
     },
 
-    resetCommitState() {
+    resetCommitState(data) {
       this.submitCommitsLoading = false;
       this.changedFiles = [];
       this.commitMessage = '';

app/assets/javascripts/repo/services/repo_service.js

@@ -65,14 +65,14 @@ const RepoService = {
     return urlArray.join('/');
   },
 
-  commitFiles(payload, cb) {
-    Api.commitMultiple(Store.projectId, payload, (data) => {
+  commitFiles(payload) {
+    return Api.commitMultiple(Store.projectId, payload)
+    .then((data) => {
       if (data.short_id && data.stats) {
         Flash(`Your changes have been committed. Commit ${data.short_id} with ${data.stats.additions} additions, ${data.stats.deletions} deletions.`, 'notice');
       } else {
         Flash(data.message);
       }
-      cb();
     });
   },
 };