dart2js: Fix hints in code base.

pkg/compiler/lib/src/use_unused_api.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// This file use methods that aren't used by dart2js.dart, but that we wish to
 /// keep anyway. This might be general API that isn't currently in use,
 /// debugging aids, or API only used for testing (see TODO below).
 
 library dart2js.use_unused_api;
 
@@ skipping 30 matching lines @@
 
 import 'scanner/scannerlib.dart' show
     PartialClassElement,
     PartialFunctionElement;
 
 class ElementVisitor extends elements_visitor.BaseElementVisitor {
   visitElement(e, a) {}
 }
 
 void main(List<String> arguments) {
-  useApi();
+  useApi(null);
   dart2js.main(arguments);
   dart2jslib.isPublicName(null);
   useConstant(null, null, null, null, null);
   useNode(null);
   useUtil(null);
   useSetlet(null);
   useImmutableEmptySet(null);
   useElementVisitor(new ElementVisitor());
   useJsNode(new js.Program(null));
   useJsNode(new js.NamedFunction(null, null));
@@ skipping 10 matching lines @@
   useIr(null);
   useCompiler(null);
   useTypes();
   useCodeEmitterTask(null);
   useScript(null);
   useProgramBuilder(null);
   useSemanticVisitor();
   useTreeVisitors();
 }
 
-useApi() {
-  api.ReadStringFromUri uri;
+useApi(api.ReadStringFromUri uri) {
 }
 
+

[karlklose, 2015/06/11 10:56:16]

Revert.

[herhut, 2015/06/11 12:48:55]

Done.

+
 void useConstant(constants.ConstantValue constant,
                  constants.ConstantExpression expression,
                  constants.ConstructedConstantExpression constructedConstant,
                  constants.ConstantSystem cs,
                  constants.Environment env) {
   constant.isObject;
   cs.isBool(constant);
   constructedConstant.computeInstanceType();
   constructedConstant.computeInstanceFields();
   expression.evaluate(null, null);
@@ skipping 206 matching lines @@
 
 class TreeVisitor1 extends tree_ir.ExpressionVisitor1
                       with tree_ir.StatementVisitor1 {
   noSuchMethod(inv) {}
 }
 
 useTreeVisitors() {
   new TreeVisitor1().visitExpression(null, null);
   new TreeVisitor1().visitStatement(null, null);
 }