Lacros: Enable IME.

Bug: 1133732, 1123705
Test: Ran Lacros locally.
Change-Id: Id74573390f287512a4455636e7b636255df4e025
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2503528Reviewed-by: James Cook <jamescook@chromium.org>
Commit-Queue: Hidehiko Abe <hidehiko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821320}

chrome/browser/chromeos/crosapi/browser_manager.cc

@@ -303,6 +303,7 @@ void BrowserManager::StartWithLogFile(base::ScopedFD logfd) {
                                    "--enable-oop-rasterization",
                                    "--lang=en-US",
                                    "--enable-crashpad",
+                                   "--enable-wayland-ime",
                                    "--breakpad-dump-location=" + crash_dir};
 
   // CrAS is the default audio server in Chrome OS.