Don't track SCM changes in rebaseline commands.

third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/auto_rebaseline_unittest.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import optparse
 
 from webkitpy.common.net.buildbot import Build
 from webkitpy.common.net.layouttestresults import LayoutTestResults
 from webkitpy.common.system.executive_mock import MockExecutive
 from webkitpy.layout_tests.builder_list import BuilderList
@@ skipping 218 matching lines @@
                 ['python', 'echo', 'copy-existing-baselines-internal', '--suffixes', 'txt',
                  '--builder', 'MOCK Mac10.11', '--test', 'fast/dom/prototype-taco.html'],
             ],
             [
                 ['python', 'echo', 'rebaseline-test-internal', '--suffixes', 'png',
                  '--builder', 'MOCK Mac10.11', '--test', 'fast/dom/prototype-strawberry.html'],
                 ['python', 'echo', 'rebaseline-test-internal', '--suffixes', 'txt',
                  '--builder', 'MOCK Mac10.11', '--test', 'fast/dom/prototype-taco.html'],
             ],
             [
-                ['python', 'echo', 'optimize-baselines', '--no-modify-scm',
+                ['python', 'echo', 'optimize-baselines',
                  '--suffixes', 'png', 'fast/dom/prototype-strawberry.html'],
-                ['python', 'echo', 'optimize-baselines', '--no-modify-scm',
+                ['python', 'echo', 'optimize-baselines',
                  '--suffixes', 'txt', 'fast/dom/prototype-taco.html'],
             ],
             ['git', 'cl', 'upload', '-f'],
             ['git', 'pull'],
             ['git', 'cl', 'land', '-f', '-v'],
             ['git', 'config', 'branch.auto-rebaseline-temporary-branch.rietveldissue'],
         ])
 
         # The mac ports should both be removed since they're the only ones in builders._exact_matches.
         self.assertEqual(self.tool.filesystem.read_text_file(test_port.path_to_generic_test_expectations_file()), """
@@ skipping 42 matching lines @@
         self.command.tree_status = lambda: 'open'
         self.tool.executive = MockExecutive()
         self.tool.executive.calls = []
         self._execute_with_mock_options()
 
         self.assertEqual(self.tool.executive.calls, [
             [['python', 'echo', 'copy-existing-baselines-internal', '--suffixes', 'txt',
               '--builder', 'MOCK Mac10.11', '--test', 'fast/dom/prototype-taco.html']],
             [['python', 'echo', 'rebaseline-test-internal', '--suffixes', 'txt',
               '--builder', 'MOCK Mac10.11', '--test', 'fast/dom/prototype-taco.html']],
-            [['python', 'echo', 'optimize-baselines', '--no-modify-scm', '--suffixes', 'txt', 'fast/dom/prototype-taco.html']],
+            [['python', 'echo', 'optimize-baselines', '--suffixes', 'txt', 'fast/dom/prototype-taco.html']],
             ['git', 'cl', 'upload', '-f'],
         ])
 
     def test_execute_test_passes_everywhere(self):
         def blame(_):
             return """
 6469e754a1 path/to/TestExpectations                   (<foobarbaz1@chromium.org> 2013-04-28 04:52:41 +0000   13) Bug(foo) fast/dom/prototype-taco.html [ NeedsRebaseline ]
 """
         self.tool.scm().blame = blame
 
@@ skipping 205 matching lines @@
 
     def test_execute_with_dry_run(self):
         self._basic_execute_test([], dry_run=True)
         self.assertEqual(self.tool.scm().local_commits(), [])
 
     def test_bot_revision_data(self):
         self._setup_mock_build_data()
         self.assertEqual(
             self.command.bot_revision_data(self.tool.scm()),
             [{'builder': 'MOCK Win7', 'revision': '9000'}])