Add more flexible SUITE_RUNNER_LOOKUP (#438)

Add SUITE_RUNNER_LOOKUP to dynamically look up the suite runner class

resources/benchmark-runner.mjs

@@ -409,7 +409,8 @@ export class BenchmarkRunner {
     async runSuite(suite) {
         // FIXME: Encapsulate more state in the SuiteRunner.
         // FIXME: Return and use measured values from SuiteRunner.
-        const suiteRunner = new SuiteRunner(this._measuredValues, this._frame, this._page, this._client, suite);
+        const suiteRunnerClass = SUITE_RUNNER_LOOKUP[suite.type ?? "default"];
+        const suiteRunner = new suiteRunnerClass(this._measuredValues, this._frame, this._page, this._client, suite);
         await suiteRunner.run();
     }
 
@@ -622,3 +623,12 @@ export class SuiteRunner {
             await this._client.didRunTest(this._suite, test);
     }
 }
+
+// FIXME: implement remote steps
+class RemoteSuiteRunner extends SuiteRunner {}
+
+const SUITE_RUNNER_LOOKUP = {
+    __proto__: null,
+    default: SuiteRunner,
+    remote: RemoteSuiteRunner,
+};