Make 'chromeos-chrome' a constant.

BUG=none
TEST=Unit tests, chrome trybot.
Change-Id: I0eb862361981374956bdabb890de981bae57c1e0
Reviewed-on: https://gerrit.chromium.org/gerrit/38653
Commit-Ready: David James <davidjames@chromium.org>
Reviewed-by: David James <davidjames@chromium.org>
Tested-by: David James <davidjames@chromium.org>
diff --git a/scripts/deploy_chrome.py b/scripts/deploy_chrome.py
index 43f64bf..b730537 100644
--- a/scripts/deploy_chrome.py
+++ b/scripts/deploy_chrome.py
@@ -25,6 +25,7 @@
 import time
 
 
+from chromite.buildbot import constants
 from chromite.lib import chrome_util
 from chromite.lib import cros_build_lib
 from chromite.lib import commandline
@@ -326,7 +327,7 @@
   cmd = [gs_bin, 'ls', gs_path]
   files = DebugRunCommandCaptureOutput(cmd).output.splitlines()
   files = [found for found in files if
-           _UrlBaseName(found).startswith('chromeos-chrome-')]
+           _UrlBaseName(found).startswith('%s-' % constants.CHROME_PN)]
   if not files:
     raise Exception('No chrome package found at %s' % gs_path)
   elif len(files) > 1: