Don't track SCM changes in rebaseline commands.

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

Index: third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/git.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/git.py b/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/git.py
index 29620fb700f71600e7601d9af6d89906750f27db..a1b562ae3ef876698ff6025faf240057ab9a6f52 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/git.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/git.py
@@ -117,6 +117,9 @@ class Git(SCM):
     def _status_regexp(self, expected_types):
         return '^(?P<status>[%s])\t(?P<filename>.+)$' % expected_types
 
+    def add_all(self):

[wkorman, 2016/10/06 21:10:22]

What if we allow passing a pathspec, which --all supports, and when we run the
command we only apply the --all to third_party/WebKit/LayoutTests to reduce
likelihood of incorporating files eng may have sitting around elsewhere?

[qyearsley, 2016/10/06 23:05:57]

Good idea, will add this :-)

+        return self._run_git(['add', '--all'])
+
     def add_list(self, paths, return_exit_code=False, recurse=True):
         return self._run_git(["add"] + paths, return_exit_code=return_exit_code)