Pass the diffFile down so the renamed viewer can use it

Also updates other components that eventually
use the same component

app/assets/javascripts/diffs/components/diff_content.vue

@@ -128,6 +128,7 @@ export default {
       <no-preview-viewer v-else-if="noPreview" />
       <diff-viewer
         v-else
+        :diff-file="diffFile"
         :diff-mode="diffMode"
         :diff-viewer-mode="diffViewerMode"
         :new-path="diffFile.new_path"

app/assets/javascripts/notes/components/diff_with_note.vue

@@ -116,6 +116,7 @@ export default {
     </div>
     <div v-else>
       <diff-viewer
+        :diff-file="discussion.diff_file"
         :diff-mode="diffMode"
         :diff-viewer-mode="diffViewerMode"
         :new-path="discussion.diff_file.new_path"

app/assets/javascripts/vue_shared/components/diff_viewer/diff_viewer.vue

@@ -7,6 +7,10 @@ import ModeChanged from './viewers/mode_changed.vue';
 
 export default {
   props: {
+    diffFile: {
+      type: Object,
+      required: true,
+    },
     diffMode: {
       type: String,
       required: true,
@@ -92,6 +96,7 @@ export default {
   <div v-if="viewer" class="diff-file preview-container">
     <component
       :is="viewer"
+      :diff-file="diffFile"
       :diff-mode="diffMode"
       :new-path="fullNewPath"
       :old-path="fullOldPath"