Use object shorthand in DraftEditorCompositionHandler

Summary: We were getting lint errors. This shouldn't change behaviour at all.

Reviewed By: claudiopro

Differential Revision: D22360887

fbshipit-source-id: 6d5c3b62d64ff69c02788de570ddebfd860dabc6

Author: mrkev

src/component/handlers/composition/DraftEditorCompositionHandler.js

@@ -62,7 +62,7 @@ const DraftEditorCompositionHandler = {
    * A `compositionstart` event has fired while we're still in composition
    * mode. Continue the current composition session to prevent a re-render.
    */
-  onCompositionStart: function(editor: DraftEditor): void {
+  onCompositionStart(editor: DraftEditor): void {
     stillComposing = true;
     startDOMObserver(editor);
   },
@@ -81,7 +81,7 @@ const DraftEditorCompositionHandler = {
    * twice could break the DOM, we only use the first event. Example: Arabic
    * Google Input Tools on Windows 8.1 fires `compositionend` three times.
    */
-  onCompositionEnd: function(editor: DraftEditor): void {
+  onCompositionEnd(editor: DraftEditor): void {
     resolved = false;
     stillComposing = false;
     setTimeout(() => {
@@ -98,7 +98,7 @@ const DraftEditorCompositionHandler = {
    * the arrow keys are used to commit, prevent default so that the cursor
    * doesn't move, otherwise it will jump back noticeably on re-render.
    */
-  onKeyDown: function(editor: DraftEditor, e: SyntheticKeyboardEvent<>): void {
+  onKeyDown(editor: DraftEditor, e: SyntheticKeyboardEvent<>): void {
     if (!stillComposing) {
       // If a keydown event is received after compositionend but before the
       // 20ms timer expires (ex: type option-E then backspace, or type A then
@@ -119,7 +119,7 @@ const DraftEditorCompositionHandler = {
    * characters that we do not want. `preventDefault` allows the composition
    * to be committed while preventing the extra characters.
    */
-  onKeyPress: function(editor: DraftEditor, e: SyntheticKeyboardEvent<>): void {
+  onKeyPress(_editor: DraftEditor, e: SyntheticKeyboardEvent<>): void {
     if (e.which === Keys.RETURN) {
       e.preventDefault();
     }
@@ -140,7 +140,7 @@ const DraftEditorCompositionHandler = {
    * Resetting innerHTML will move focus to the beginning of the editor,
    * so we update to force it back to the correct place.
    */
-  resolveComposition: function(editor: DraftEditor): void {
+  resolveComposition(editor: DraftEditor): void {
     if (stillComposing) {
       return;
     }