[test] Prepare rollout of new test-runner features

TBR=sergiyb@chromium.org
NOTRY=true

Bug: v8:6917
Change-Id: Ic4f9d151be887fa5795ebe62dcdd3b849cc176ab
Reviewed-on: https://chromium-review.googlesource.com/875965Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50715}

tools/testrunner/base_runner.py

@@ -256,6 +256,13 @@ class BaseTestRunner(object):
                       help="Run this shard from the split up tests.",
                       default=1, type="int")
 
+    # TODO(machenbach): Temporary options for rolling out new test runner
+    # features.
+    parser.add_option("--mastername",
+                      help="Mastername property from infrastructure")
+    parser.add_option("--buildername",
+                      help="Buildername property from infrastructure")
+
   def _add_parser_options(self, parser):
     pass