Support running ChromeVox in uncompressed mode and compress ChromeVox next by default.

chrome/browser/resources/chromeos/chromevox/tools/generate_manifest.py

Index: chrome/browser/resources/chromeos/chromevox/tools/generate_manifest.py
diff --git a/chrome/browser/resources/chromeos/chromevox/tools/generate_manifest.py b/chrome/browser/resources/chromeos/chromevox/tools/generate_manifest.py
index 9f152f79207e28f30414c9238164a2b93e24b8a8..d155d74b478359b75986ad6a49944a74d8079168 100755
--- a/chrome/browser/resources/chromeos/chromevox/tools/generate_manifest.py
+++ b/chrome/browser/resources/chromeos/chromevox/tools/generate_manifest.py
@@ -43,11 +43,14 @@ def main():
       '-o', '--output_manifest', action='store', metavar='OUTPUT_MANIFEST',
       help='File to place generated manifest')
   parser.add_option(
-      '-g', '--is_guest_manifest', action='store', metavar='GUEST_MANIFEST',
-      help='Generate a guest mode capable manifest')
+      '--is_guest_manifest', action='store', metavar='NUM',
+      help='Whether to generate a guest mode capable manifest')
   parser.add_option(
-      '--use_chromevox_next', action='store', metavar='CHROMEVOX2',
-      help='Generate a ChromeVox next manifest')
+      '--is_chromevox_next', action='store', metavar='NUM',
+      help='Whether to generate a ChromeVox Next manifest')
+  parser.add_option(
+      '--is_js_compressed', action='store', metavar='NUM',
+      help='Whether compressed JavaScript files are used')
   parser.add_option(
       '--set_version', action='store', metavar='SET_VERSION',
       help='Set the extension version')