| # Copyright 2016 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| _JS_FLAGS_SWITCH = '--js-flags=' |
| |
| def AppendJSFlags(options, js_flags): |
| existing_js_flags = '' |
| # There should be only one occurence of --js-flags in the browser flags. When |
| # there are multiple flags, only one of them would be used. Append any |
| # additional js_flags to the existing flags (if present). |
| for extra_arg in options.extra_browser_args: |
| if extra_arg.startswith(_JS_FLAGS_SWITCH): |
| # Find and remove the set of existing js_flags. |
| existing_js_flags = extra_arg[len(_JS_FLAGS_SWITCH):] |
| options.extra_browser_args.remove(extra_arg) |
| break |
| |
| options.AppendExtraBrowserArgs([ |
| # Add a new --js-flags which includes previous flags. |
| '%s%s %s' % (_JS_FLAGS_SWITCH, js_flags, existing_js_flags) |
| ]) |
