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..d212f00072479e8011c9ad4fa6d69c84b66261fd 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
@@ -99,8 +99,12 @@ class Git(SCM):
     def _rebase_in_progress(self):
         return self._filesystem.exists(self.absolute_path(self._filesystem.join('.git', 'rebase-apply')))
 
-    def has_working_directory_changes(self):
-        return self._run_git(['diff', 'HEAD', '--no-renames', '--name-only']) != ""
+    def has_working_directory_changes(self, pathspec=None):
+        """Checks whether there are uncommitted changes."""
+        command = ['diff', 'HEAD', '--no-renames', '--name-only']
+        if pathspec:
+            command.extend(['--', pathspec])
+        return self._run_git(command) != ''
 
     def _discard_working_directory_changes(self):
         # Could run git clean here too, but that wouldn't match subversion
@@ -117,6 +121,12 @@ class Git(SCM):
     def _status_regexp(self, expected_types):
         return '^(?P<status>[%s])\t(?P<filename>.+)$' % expected_types
 
+    def add_all(self, pathspec=None):
+        command = ['add', '--all']
+        if pathspec:
+            command.append(pathspec)
+        return self._run_git(command)
+
     def add_list(self, paths, return_exit_code=False, recurse=True):
         return self._run_git(["add"] + paths, return_exit_code=return_exit_code)