dart2js: Fix hints in code base.

pkg/compiler/lib/src/resolution/members.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.
 
 part of resolution;
 
 /**
  * Core implementation of resolution.
  *
  * Do not subclass or instantiate this class outside this library
@@ skipping 1954 matching lines @@
         }
         registry.registerClassUsingVariableExpression(cls);
         registry.registerTypeVariableExpression();
         registerTypeLiteralAccess(node, target);
       } else if (target.impliesType && (!sendIsMemberAccess || node.isCall)) {
         registerTypeLiteralAccess(node, target);
       }
       registerPotentialAccessInClosure(node, target);
     }
 
-    bool resolvedArguments = false;
     resolveArguments(node.argumentsNode);
 
     // If the selector is null, it means that we will not be generating
     // code for this as a send.
     Selector selector = registry.getSelector(node);
     if (selector == null) return const NoneResult();
 
     if (node.isCall) {
       if (Elements.isUnresolved(target) ||
           target.isGetter ||
@@ skipping 474 matching lines @@
     ResolutionResult result = visit(node.expression);
     allowedCategory = oldCategory;
     sendIsMemberAccess = oldSendIsMemberAccess;
     if (result.kind == ResultKind.CONSTANT) {
       return result;
     }
     return const NoneResult();
   }
 
   ResolutionResult visitNewExpression(NewExpression node) {
-    Node selector = node.send.selector;
     FunctionElement constructor = resolveConstructor(node);
     final bool isSymbolConstructor = constructor == compiler.symbolConstructor;
     final bool isMirrorsUsedConstant =
         node.isConst && (constructor == compiler.mirrorsUsedConstructor);
     Selector callSelector = resolveSelector(node.send, constructor);
     resolveArguments(node.send.argumentsNode);
     registry.useElement(node.send, constructor);
     if (Elements.isUnresolved(constructor)) {
       return new ResolutionResult.forElement(constructor);
     }
@@ skipping 784 matching lines @@
     }
     return const NoneResult();
   }
 }
 
 /// Looks up [name] in [scope] and unwraps the result.
 Element lookupInScope(Compiler compiler, Node node,
                       Scope scope, String name) {
   return Elements.unwrap(scope.lookup(name), compiler, node);
 }