Remove warnings from dart2js test-suite.

tests/compiler/dart2js/dart_printer_test.dart

 library dart_printer_test;
 
 import "package:expect/expect.dart";
 import '../../../sdk/lib/_internal/compiler/implementation/dart_backend/dart_printer.dart';
 import '../../../sdk/lib/_internal/compiler/implementation/scanner/scannerlib.dart';
 import '../../../sdk/lib/_internal/compiler/implementation/source_file.dart';
 import '../../../sdk/lib/_internal/compiler/implementation/dart2jslib.dart';
 import '../../../sdk/lib/_internal/compiler/implementation/tree/tree.dart' show DartString;
 import 'dart:mirrors';
 import '../../../sdk/lib/_internal/compiler/implementation/tree/tree.dart' as tree;
@@ skipping 568 matching lines @@
   
   endLabeledStatement(int labelCount) {
     Statement statement = pop();
     for (int i=0; i<labelCount; i++) {
       String label = pop(asName);
       statement = new LabeledStatement(label, statement);
     }
     push(statement);
   }
   
+  // TODO(kmillikin,asgerf): this code is currently untested.
   endFunctionDeclaration(Token end) {
     Statement body = pop();
     Parameters parameters = pop();
     String name = pop(asName);
     TypeAnnotation returnType = popTypeAnnotation();
-    push(new FunctionStatement(name, parameters, body, returnType));
+    push(new FunctionDeclaration(name, parameters, body));
   }
   
   endFunctionBody(int count, Token begin, Token end) {
     push(new Block(popList(count, <Statement>[])));
   }
 }
 
 class DefaultValue {
   final Expression expression;
   DefaultValue(this.expression);
@@ skipping 322 matching lines @@
   
   checkStatement("[1].bar();");
   checkStatement("1.bar();");
   checkStatement("'foo'.bar();");
 
   checkStatement("do while(x); while (y);");
   checkStatement("{do; while(x); while (y);}");
   
 }