i18n in some files

app/assets/javascripts/repo/index.js

 /* global monaco */
 import $ from 'jquery';
 import Vue from 'vue';
+import Translate from '../vue_shared/translate';
 import RepoSidebar from './repo_sidebar.vue';
 import EditButton from './repo_edit_button';
 import Service from './repo_service';
@@ -14,6 +15,8 @@ import monacoLoader from './monaco_loader';
 import RepoMixin from './repo_mixin';
 import PopupDialog from '../vue_shared/components/popup_dialog.vue'
 
+Vue.use(Translate);
+
 function repoEditorLoader() {
   return new Promise((resolve) => {
     monacoLoader(['vs/editor/editor.main'], () => {
@@ -74,7 +77,15 @@ function initRepo() {
           <repo-binary-viewer/>
         </div>
         <repo-commit-section/>
-        <popup-dialog primary-button-label="Discard changes" :open="dialog.open" kind="warning" title="Are you sure?" body="Are you sure you want to discard your changes?" @toggle="dialogToggled" @submit="dialogSubmitted"></popup-dialog>
+        <popup-dialog
+          :primary-button-label="__('Discard changes')"
+          :open="dialog.open"
+          kind="warning"
+          :title="__('Are you sure?')"
+          :body="__('Are you sure you want to discard your changes?')"
+          @toggle="dialogToggled"
+          @submit="dialogSubmitted"
+        />
       </div>
     `,
     mixins: [RepoMixin],

app/assets/javascripts/repo/repo_edit_button.js

 import Vue from 'vue';
 import Store from './repo_store';
-import RepoMixin from './repo_mixin'
+import RepoMixin from './repo_mixin';
+import { __ } from '../locale';
 
 export default class RepoEditButton {
   constructor(el) {
@@ -14,7 +15,7 @@ export default class RepoEditButton {
       data: () => Store,
       computed: {
         buttonLabel() {
-          return this.editMode ? 'Cancel edit' : 'Edit';
+          return this.editMode ? __('Cancel edit') : __('Edit');
         },
 
         buttonIcon() {