Make resource_sizes.py accept --isolated-script-test-perf-output.

It doesn't appear to do anything, but we still pass it (for now).

Bug: 861983
Change-Id: I9e5aced1aeedd9dbb3151a5e1a1dcca5c60489f1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1574430
Commit-Queue: John Budorick <jbudorick@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Auto-Submit: John Budorick <jbudorick@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#652421}

build/android/resource_sizes.py

@@ -734,6 +734,11 @@ def main():
   # Accepted to conform to the isolated script interface, but ignored.
   argparser.add_argument(
       '--isolated-script-test-filter', help=argparse.SUPPRESS)
+  argparser.add_argument(
+      '--isolated-script-test-perf-output',
+      type=os.path.realpath,
+      help=argparse.SUPPRESS)
+
   argparser.add_argument(
       '--isolated-script-test-output',
       type=os.path.realpath,