Fix rebaseline bug when new files are under untracked directories

third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/git.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/git.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/git.py b/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/git.py
index f50d7d8edd29555538d6adac839f9aaa6fd13d1c..1024d14e2172d4ed3554e2156278bdf412c6382e 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/git.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/git.py
@@ -163,7 +163,7 @@ class Git(object):
         """
         # `git status -z` is a version of `git status -s`, that's recommended
         # for machine parsing. Lines are terminated with NUL rather than LF.
-        change_lines = self._run_git(['status', '-z']).rstrip('\x00')
+        change_lines = self._run_git(['status', '-z', '--untracked-files=all']).rstrip('\x00')
         if not change_lines:
             return {}  # No changes.
         unstaged_changes = {}