Revert "[Fasta] Do not emit default arguments at callsite"

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

Index: pkg/front_end/lib/src/fasta/kernel/kernel_library_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_library_builder.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_library_builder.dart
index b675255092ade45252f24370ef4bcb4bb7c91c0b..8c0031c4b81aa67282c039d66ff3cba7cf755dac 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_library_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_library_builder.dart
@@ -337,6 +337,12 @@ class KernelLibraryBuilder
     return new KernelInvalidTypeBuilder(name, charOffset, fileUri);
   }
 
+  void addArgumentsWithMissingDefaultValues(
+      Arguments arguments, FunctionNode function) {
+    assert(partOfLibrary == null);
+    argumentsWithMissingDefaultValues.add([arguments, function]);
+  }
+
   int finishStaticInvocations() {
     CloneVisitor cloner;
     for (var list in argumentsWithMissingDefaultValues) {