Fix code and update README with correct UI text

functional-samples/cookbook.file_handlers/README.md

@@ -18,4 +18,4 @@ applications.
 2. Load this directory in Chrome as an [unpacked extension](https://developer.chrome.com/docs/extensions/mv3/getstarted/development-basics/#load-unpacked).
 3. Create a .txt file on your ChromeOS device.
 4. In the Files app, select the file.
-5. In the toolbar, choose "Open with..." and then "File Handling API".
+5. In the toolbar, choose "Open" and then "File Handling API".

functional-samples/cookbook.file_handlers/view-file.js

@@ -20,7 +20,7 @@ async function consumer(launchParams) {
   // Get metadata for each file.
   const files = await Promise.all(
     launchParams.files.map(async (f) => {
-      const file = await f.file();
+      const file = await f.getFile();
 
       return {
         name: file.name,