Test Runner: Accept Chromium args.

src/tests/test_utils/runner/README.md

@@ -13,15 +13,20 @@ The ANGLE test harness is a harness around GoogleTest that provides functionalit
 The ANGLE test harness accepts all standard GoogleTest arguments. The harness also accepts the
 following additional command-line arguments:
 
- * `--shard-count` and `--shard-index` control the test sharding
- * `--bot-mode` enables multi-process execution and test batching
  * `--batch-size` limits the number of tests to run in each batch
  * `--batch-timeout` limits the amount of time spent in each batch
+ * `--bot-mode` enables multi-process execution and test batching
+ * `--debug-test-groups` dumps the test config categories when using `bot-mode`
+ * `--filter-file` allows passing a larget `gtest_filter` via a file
+ * `--histogram-json-file` outputs a [formatted JSON file][HistogramSet] for perf dashboards
  * `--max-processes` limits the number of simuntaneous processes
- * `--test-timeout` limits the amount of time spent in each test
- * `--results-file` specifies a location for the JSON test result output
  * `--results-directory` specifies a directory to write test results to
- * `--filter-file` allows passing a larget `gtest_filter` via a file
+ * `--results-file` specifies a location for the JSON test result output
+ * `--shard-count` and `--shard-index` control the test sharding
+ * `--test-timeout` limits the amount of time spent in each test
+
+`--isolated-script-test-output` and `--isolated-script-perf-test-output` mirror `--results-file`
+and `--histogram-json-file` respectively.
 
 As well as the custom command-line arguments we support a few standard GoogleTest arguments:
 
@@ -52,3 +57,4 @@ See the source code for more details: [TestSuite.h](TestSuite.h) and [TestSuite.
 
 [BaseTest]: https://chromium.googlesource.com/chromium/src/+/refs/heads/master/base/test/
 [JSONFormat]: https://chromium.googlesource.com/chromium/src/+/master/docs/testing/json_test_results_format.md
+[HistogramSet]: https://chromium.googlesource.com/catapult/+/HEAD/docs/histogram-set-json-format.md

src/tests/test_utils/runner/TestSuite.cpp

@@ -954,6 +954,7 @@ TestSuite::~TestSuite()
 
 bool TestSuite::parseSingleArg(const char *argument)
 {
+    // Note: Flags should be documented in README.md.
     return (ParseIntArg("--shard-count=", argument, &mShardCount) ||
             ParseIntArg("--shard-index=", argument, &mShardIndex) ||
             ParseIntArg("--batch-size=", argument, &mBatchSize) ||
@@ -962,8 +963,10 @@ bool TestSuite::parseSingleArg(const char *argument)
             ParseIntArg("--batch-timeout=", argument, &mBatchTimeout) ||
             ParseStringArg("--results-directory=", argument, &mResultsDirectory) ||
             ParseStringArg(kResultFileArg, argument, &mResultsFile) ||
+            ParseStringArg("--isolated-script-test-output", argument, &mResultsFile) ||
             ParseStringArg(kFilterFileArg, argument, &mFilterFile) ||
             ParseStringArg(kHistogramJsonFileArg, argument, &mHistogramJsonFile) ||
+            ParseStringArg("--isolated-script-perf-test-output", argument, &mHistogramJsonFile) ||
             ParseFlag("--bot-mode", argument, &mBotMode) ||
             ParseFlag("--debug-test-groups", argument, &mDebugTestGroups));
 }