Change signature of resolveConstructors.

pkg/front_end/lib/src/fasta/kernel/kernel_class_builder.dart

Index: pkg/front_end/lib/src/fasta/kernel/kernel_class_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_class_builder.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_class_builder.dart
index 34a72fea7d01a7c61b90ce1b3aa8a50e8a1f30dc..209699dac7cb2b7953b00e6934b47942abc5a1a6 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_class_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_class_builder.dart
@@ -107,7 +107,8 @@ abstract class KernelClassBuilder
     }
   }
 
-  int resolveConstructors(KernelLibraryBuilder library) {
+  @override
+  int resolveConstructors(LibraryBuilder library) {
     int count = super.resolveConstructors(library);
     if (count != 0) {
       // Copy keys to avoid concurrent modification error.
@@ -162,9 +163,8 @@ abstract class KernelClassBuilder
       ListLiteral literal = new ListLiteral(<Expression>[]);
       Name name = new Name("_redirecting#", library.library);
       Field field = new Field(name,
-          isStatic: true,
-          initializer: literal,
-          fileUri: cls.fileUri)..fileOffset = cls.fileOffset;
+          isStatic: true, initializer: literal, fileUri: cls.fileUri)
+        ..fileOffset = cls.fileOffset;
       cls.addMember(field);
       return new DillMemberBuilder(field, this);
     });