Add support for --test-launcher-retry-limit to fuchsia/test_runner.py.

The script now passes the argument through to the test suite. This allows the
default value of 3 to be overridden.

Bug: 910027
Change-Id: If9bd23756262a84443c097aeafa011e05e84f876
Reviewed-on: https://chromium-review.googlesource.com/c/1354274
Commit-Queue: Wez <wez@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612282}

build/fuchsia/test_runner.py

@@ -32,6 +32,9 @@ def main():
   parser.add_argument('--gtest_repeat',
                       help='GTest repeat value to use. This also disables the '
                            'test launcher timeout.')
+  parser.add_argument('--test-launcher-retry-limit',
+                      help='Number of times that test suite will retry failing '
+                           'tests. This is multiplicative with --gtest_repeat.')
   parser.add_argument('--gtest_break_on_failure', action='store_true',
                       default=False,
                       help='Should GTest break on failure; useful with '
@@ -79,6 +82,9 @@ def main():
   if args.gtest_repeat:
     child_args.append('--gtest_repeat=' + args.gtest_repeat)
     child_args.append('--test-launcher-timeout=-1')
+  if args.test_launcher_retry_limit:
+    child_args.append(
+        '--test-launcher-retry-limit=' + args.test_launcher_retry_limit)
   if args.gtest_break_on_failure:
     child_args.append('--gtest_break_on_failure')
   if args.child_args: