flutter tool: log dart2wasm vs dart2js as appropriate during build (#124331)

flutter tool: log dart2wasm vs dart2js as appropriate during build

packages/flutter_tools/lib/src/web/compile.dart

@@ -119,7 +119,11 @@ class WebBuilder {
     } finally {
       status.stop();
     }
-    _flutterUsage.sendTiming('build', 'dart2js', Duration(milliseconds: sw.elapsedMilliseconds));
+    _flutterUsage.sendTiming(
+      'build',
+      compilerConfig.isWasm ? 'dart2wasm' : 'dart2js',
+      Duration(milliseconds: sw.elapsedMilliseconds),
+    );
   }
 }
 

packages/flutter_tools/test/general.shard/web/compile_web_test.dart

@@ -78,7 +78,7 @@ void main() {
     // Sends timing event.
     final TestTimingEvent timingEvent = testUsage.timings.single;
     expect(timingEvent.category, 'build');
-    expect(timingEvent.variableName, 'dart2js');
+    expect(timingEvent.variableName, 'dart2wasm');
   });
 
   testUsingContext('WebBuilder throws tool exit on failure', () async {