Pass eventTimeStamp to 'handleKeyPress' to allow tracking

Summary:
For purposes of logging, so that we can get the exact timestamp from the event
object for this event.

Reviewed By: dwwoelfel

Differential Revision: D7955262

fbshipit-source-id: b905088a28abc0b1c18ce55cf7d1651674e3fa64

docs/APIReference-Editor.md

@@ -217,7 +217,7 @@ rendered list of results to trigger applying the mention entity to your content.
 
 #### handleKeyCommand
 ```
-handleKeyCommand?: (command: string, editorState: EditorState) => DraftHandleValue
+handleKeyCommand?: (command: string, editorState: EditorState, eventTimeStamp: number) => DraftHandleValue
 ```
 Handle the named editor command. See
 [Advanced Topics: Key Bindings](/docs/advanced-topics-key-bindings.html)

src/component/base/DraftEditorProps.js

@@ -118,6 +118,7 @@ export type DraftEditorProps = {
   handleKeyCommand?: (
     command: DraftEditorCommand | string,
     editorState: EditorState,
+    eventTimeStamp: number,
   ) => DraftHandleValue,
 
   // Handle intended text insertion before the insertion occurs. This may be

src/component/handlers/edit/editOnKeyDown.js

@@ -184,7 +184,9 @@ function editOnKeyDown(editor: DraftEditor, e: SyntheticKeyboardEvent<>): void {
   // Allow components higher up the tree to handle the command first.
   if (
     editor.props.handleKeyCommand &&
-    isEventHandled(editor.props.handleKeyCommand(command, editorState))
+    isEventHandled(
+      editor.props.handleKeyCommand(command, editorState, e.timeStamp),
+    )
   ) {
     return;
   }

src/model/modifier/RichTextEditorUtil.js

@@ -54,6 +54,7 @@ const RichTextEditorUtil = {
   handleKeyCommand: function(
     editorState: EditorState,
     command: DraftEditorCommand | string,
+    eventTimeStamp: ?number,
   ): ?EditorState {
     switch (command) {
       case 'bold':