Don't track SCM changes in rebaseline commands.

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

 # Copyright (C) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #    * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #    * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 22 matching lines @@
 class MockSCM(object):
     executable_name = "MockSCM"
 
     def __init__(self, filesystem=None, executive=None):
         self.checkout_root = "/mock-checkout"
         self.added_paths = set()
         self._filesystem = filesystem or MockFileSystem()
         self._executive = executive or MockExecutive()
         self._local_commits = []
 
+    def add_all(self):
+        pass

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

Note, I think it might be nice to actually make this add files to added_paths so
that this can be checked in tests. Will add this in next patchset.

+
     def add(self, destination_path, return_exit_code=False):
         self.add_list([destination_path], return_exit_code)
 
     def add_list(self, destination_paths, return_exit_code=False):
         self.added_paths.update(set(destination_paths))
         if return_exit_code:
             return 0
 
     def has_working_directory_changes(self):
         return False
@@ skipping 60 matching lines @@
         for path in paths:
             if self._filesystem.exists(path):
                 self._filesystem.remove(path)
 
     def move(self, origin, destination):
         if self._filesystem:
             self._filesystem.move(self.absolute_path(origin), self.absolute_path(destination))
 
     def changed_files(self):
         return []