Dart SDK Spelling b, c, and d.

pkg/compiler/lib/src/js/rewrite_async.dart

Index: pkg/compiler/lib/src/js/rewrite_async.dart
diff --git a/pkg/compiler/lib/src/js/rewrite_async.dart b/pkg/compiler/lib/src/js/rewrite_async.dart
index bc056560600d76930f657428ae34bb6dbc5f9c2c..d678acf4894e1d035962d68f3d4e2ccf8c129202 100644
--- a/pkg/compiler/lib/src/js/rewrite_async.dart
+++ b/pkg/compiler/lib/src/js/rewrite_async.dart
@@ -1676,7 +1676,7 @@ class AsyncRewriter extends AsyncRewriterBase {
   /// - The completer object [completer]
   final js.Expression asyncHelper;
 
-  /// Contructor used to initialize the [completer] variable.
+  /// Constructor used to initialize the [completer] variable.
   ///
   /// Specific to async methods.
   final js.Expression newCompleter;
@@ -1799,7 +1799,7 @@ class AsyncRewriter extends AsyncRewriterBase {
 class SyncStarRewriter extends AsyncRewriterBase {
   bool get isSyncStar => true;
 
-  /// Contructor creating the Iterable for a sync* method. Called with
+  /// Constructor creating the Iterable for a sync* method. Called with
   /// [bodyName].
   final js.Expression newIterable;
 
@@ -1966,7 +1966,7 @@ class AsyncStarRewriter extends AsyncRewriterBase {
   /// - null.
   final js.Expression asyncStarHelper;
 
-  /// Contructor used to initialize the [controllerName] variable.
+  /// Constructor used to initialize the [controllerName] variable.
   ///
   /// Specific to async* methods.
   final js.Expression newController;