[web_benchmarks] Report correct expected metrics for wasm (#10236)

Depends on flutter/flutter@2e51c3f which will be part of the `3.38.0` release.

Fixes flutter/flutter#177057

Author: mdebbar

packages/web_benchmarks/CHANGELOG.md

@@ -1,6 +1,7 @@
-## NEXT
+## 4.1.0
 
-* Updates minimum supported SDK version to Flutter 3.32/Dart 3.8.
+* Fixes the reported metrics in `expectedBenchmarkMetrics` for wasm.
+* Updates minimum supported SDK version to Flutter 3.38/Dart 3.10.
 
 ## 4.0.0
 

packages/web_benchmarks/lib/src/metrics.dart

@@ -144,14 +144,15 @@ final class PercentileMetricComputation extends BenchmarkMetricComputation {
 
 /// The list of expected benchmark metrics for the current compilation mode, as
 /// determined by the value of [useWasm].
-List<BenchmarkMetric> expectedBenchmarkMetrics({required bool useWasm}) {
+List<BenchmarkMetric> expectedBenchmarkMetrics({
+  @Deprecated(
+    'This parameter is unused and will be removed in a future release.',
+  )
+  bool? useWasm,
+}) {
   return <BenchmarkMetric>[
-    // The skwasm renderer doesn't have preroll or apply frame steps in its
-    // rendering.
-    if (!useWasm) ...<BenchmarkMetric>[
-      BenchmarkMetric.prerollFrame,
-      BenchmarkMetric.applyFrame,
-    ],
+    BenchmarkMetric.prerollFrame,
+    BenchmarkMetric.applyFrame,
     BenchmarkMetric.drawFrame,
     BenchmarkMetric.flutterFrameTotalTime,
     BenchmarkMetric.flutterFrameBuildTime,

packages/web_benchmarks/pubspec.yaml

@@ -2,11 +2,11 @@ name: web_benchmarks
 description: A benchmark harness for performance-testing Flutter apps in Chrome.
 repository: https://github.com/flutter/packages/tree/main/packages/web_benchmarks
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+web_benchmarks%22
-version: 4.0.0
+version: 4.1.0
 
 environment:
-  sdk: ^3.8.0
-  flutter: ">=3.32.0"
+  sdk: ^3.10.0
+  flutter: ">=3.38.0"
 
 dependencies:
   collection: ^1.18.0

packages/web_benchmarks/testing/test_app/benchmark/web_benchmarks_test.dart

@@ -84,9 +84,9 @@ Future<BenchmarkResults> _runBenchmarks({
     compilationOptions: compilationOptions,
   );
 
-  final List<String> expectedMetrics = expectedBenchmarkMetrics(
-    useWasm: compilationOptions.useWasm,
-  ).map((BenchmarkMetric metric) => metric.label).toList();
+  final List<String> expectedMetrics = expectedBenchmarkMetrics()
+      .map((BenchmarkMetric metric) => metric.label)
+      .toList();
 
   for (final String benchmarkName in benchmarkNames) {
     for (final String metricName in expectedMetrics) {