Dart SDK Spelling b, c, and d.

pkg/front_end/tool/fasta_perf.dart

Index: pkg/front_end/tool/fasta_perf.dart
diff --git a/pkg/front_end/tool/fasta_perf.dart b/pkg/front_end/tool/fasta_perf.dart
index 10eea4d10fb59f37bf01d85aeb9ceaf01cde2631..5a2d6e04e00ab2c2f9d113373964c9f1ed50c1ad 100644
--- a/pkg/front_end/tool/fasta_perf.dart
+++ b/pkg/front_end/tool/fasta_perf.dart
@@ -197,7 +197,7 @@ class _PartialAstBuilder extends AstBuilder {
 }
 
 // Invoke the fasta kernel generator for the program starting in [entryUri]
-// TODO(sigmund): update to uyse the frontend api once fasta is beind hit.
+// TODO(sigmund): update to use the frontend api once fasta is being hit.
 generateKernel(Uri entryUri,
     {bool compileSdk: true, bool strongMode: false}) async {
   // TODO(sigmund): this is here only to compute the input size,