Fix running presubmit_support.py directly

R=cmp@chromium.org
BUG=
TEST=


Review URL: http://codereview.chromium.org/9234038

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@119264 0039d316-1c4b-4281-b951-d872f2087c98

presubmit_support.py

@@ -1183,22 +1183,22 @@ def load_files(options, args):
   """Tries to determine the SCM."""
   change_scm = scm.determine_scm(options.root)
   files = []
+  if args:
+    files = ParseFiles(args, options.recursive)
   if change_scm == 'svn':
     change_class = SvnChange
-    status_fn = scm.SVN.CaptureStatus
+    if not files:
+      files = scm.SVN.CaptureStatus([], options.root)
   elif change_scm == 'git':
     change_class = GitChange
-    status_fn = scm.GIT.CaptureStatus
+    # TODO(maruel): Get upstream.
+    if not files:
+      files = scm.GIT.CaptureStatus([], options.root, None)
   else:
     logging.info('Doesn\'t seem under source control. Got %d files' % len(args))
-    if not args:
+    if not files:
       return None, None
     change_class = Change
-  if args:
-    files = ParseFiles(args, options.recursive)
-  else:
-    # Grab modified files.
-    files = status_fn([options.root])
   return change_class, files