[Perf Waterfall] Make filter argument standard to work with Findit.

Currently it only works with the story name, i.e.:
   '--isolated-script-test-filter=dummy_page.html'
but we need it to work with the full '/'-delimited path along the test results
json, i.e.:
  '--isolated-script-test-filter=dummy_benchmark.noisy_benchmark_1/dummy_page.html'.

Bug: 894254
Change-Id: Ib9ebee49007369fc28a45e986738771e22784d5f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1611197Reviewed-by: Chan Li <chanli@chromium.org>
Commit-Queue: Caleb Rouleau <crouleau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#659347}

testing/scripts/run_performance_tests.py

@@ -233,6 +233,11 @@ def execute_gtest_perf_test(command_generator, output_paths, use_xvfb=False):
   return return_code
 
 
+class _TelemetryFilterArgument(object):
+  def __init__(self, filter_string):
+    self.benchmark, self.story = filter_string.split('/')
+
+
 class TelemetryCommandGenerator(object):
   def __init__(self, benchmark, options,
                stories=None, is_reference=False):
@@ -270,8 +275,11 @@ class TelemetryCommandGenerator(object):
     if self._options.isolated_script_test_filter:
       filter_list = common.extract_filter_list(
           self._options.isolated_script_test_filter)
+      filter_arguments = [_TelemetryFilterArgument(f) for f in filter_list]
+      applicable_stories = [
+          f.story for f in filter_arguments if f.benchmark == self.benchmark]
       # Need to convert this to a valid regex.
-      filter_regex = '(' + '|'.join(filter_list) + ')'
+      filter_regex = '(' + '|'.join(applicable_stories) + ')'
       return ['--story-filter=' + filter_regex]
     return []
 
@@ -527,4 +535,4 @@ if __name__ == '__main__':
       'compile_targets': main_compile_targets,
     }
     sys.exit(common.run_script(sys.argv[1:], funcs))
-  sys.exit(main(sys.argv))
\ No newline at end of file
+  sys.exit(main(sys.argv))

tools/perf/scripts_smoke_unittest.py

@@ -124,6 +124,8 @@ class ScriptsSmokeTest(unittest.TestCase):
         '--test-shard-map-filename=smoke_test_benchmark_shard_map.json '
         '--browser=%s '
         '--run-ref-build '
+        '--isolated-script-test-filter=dummy_benchmark.noisy_benchmark_1/'
+        'dummy_page.html::dummy_benchmark.stable_benchmark_1/dummy_page.html '
         '--isolated-script-test-repeat=2 '
         '--isolated-script-test-also-run-disabled-tests '
         '--isolated-script-test-output=%s' % (
@@ -161,7 +163,6 @@ class ScriptsSmokeTest(unittest.TestCase):
     finally:
       shutil.rmtree(tempdir)
 
-
   # Windows: ".exe" is auto-added which breaks Windows.
   # ChromeOS: crbug.com/754913.
   @decorators.Disabled('win', 'chromeos')