doc - Add units info to requestFileSystem docs

Bug: https://github.com/dart-lang/sdk/issues/20008
Change-Id: I7bd846ac546fa53a948e99cf2d054726c6d71692
Reviewed-on: https://dart-review.googlesource.com/61824
Reviewed-by: Terry Lucas <terry@google.com>
Commit-Queue: Samuel Rawlins <srawlins@google.com>
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index 34d4f4e..0302d65 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -30672,11 +30672,12 @@
   Console get console => Console._safeConsole;
 
   /**
-   * Access a sandboxed file system of the specified `size`. If `persistent` is
-   * true, the application will request permission from the user to create
-   * lasting storage. This storage cannot be freed without the user's
-   * permission. Returns a [Future] whose value stores a reference to the
-   * sandboxed file system for use. Because the file system is sandboxed,
+   * Access a sandboxed file system of `size` bytes.
+   *
+   * If `persistent` is true, the application will request permission from the
+   * user to create lasting storage. This storage cannot be freed without the
+   * user's permission. Returns a [Future] whose value stores a reference to
+   * the sandboxed file system for use. Because the file system is sandboxed,
    * applications cannot access file systems created in other web pages.
    */
   Future<FileSystem> requestFileSystem(int size, {bool persistent: false}) {
diff --git a/tools/dom/templates/html/impl/impl_Window.darttemplate b/tools/dom/templates/html/impl/impl_Window.darttemplate
index 03d768f..6575f86 100644
--- a/tools/dom/templates/html/impl/impl_Window.darttemplate
+++ b/tools/dom/templates/html/impl/impl_Window.darttemplate
@@ -174,11 +174,12 @@
   Console get console => Console._safeConsole;
 
   /**
-   * Access a sandboxed file system of the specified `size`. If `persistent` is
-   * true, the application will request permission from the user to create
-   * lasting storage. This storage cannot be freed without the user's
-   * permission. Returns a [Future] whose value stores a reference to the
-   * sandboxed file system for use. Because the file system is sandboxed,
+   * Access a sandboxed file system of `size` bytes.
+   *
+   * If `persistent` is true, the application will request permission from the
+   * user to create lasting storage. This storage cannot be freed without the
+   * user's permission. Returns a [Future] whose value stores a reference to
+   * the sandboxed file system for use. Because the file system is sandboxed,
    * applications cannot access file systems created in other web pages.
    */
   Future<FileSystem> requestFileSystem(int size, {bool persistent: false}) {