Check for compile-time constants in DartCompiler

compiler/javatests/com/google/dart/compiler/parser/SyntaxTest.java

 // Copyright (c) 2011, 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.
 
 package com.google.dart.compiler.parser;
 
 import com.google.dart.compiler.DartCompilationError;
 import com.google.dart.compiler.DartCompilerErrorCode;
 import com.google.dart.compiler.DartCompilerListener;
 import com.google.dart.compiler.DartSourceTest;
@@ skipping 135 matching lines @@
 
     parseUnitErrors("TryCatchNegative.dart",
       DartCompilerErrorCode.CATCH_OR_FINALLY_EXPECTED, 8, 3);
   }
 
   public void testArrayLiteral() {
     DartUnit unit = parseUnit("phony_array_literal.dart", "var x = <int>[1,2,3];");
     List<DartNode> nodes = unit.getTopLevelNodes();
     assertEquals(1, nodes.size());
     DartFieldDefinition f = (DartFieldDefinition)nodes.get(0);
-    DartField fieldX = (DartField)f.getFields().get(0);
+    DartField fieldX = f.getFields().get(0);
     DartArrayLiteral array = (DartArrayLiteral) fieldX.getValue();
     assertEquals(3, array.getExpressions().size());
     assertEquals(1, ((DartIntegerLiteral)array.getExpressions().get(0)).getValue().intValue());
     assertEquals(2, ((DartIntegerLiteral)array.getExpressions().get(1)).getValue().intValue());
     assertEquals(3, ((DartIntegerLiteral)array.getExpressions().get(2)).getValue().intValue());
   }
 
   public void testMapLiteral() {
     DartUnit unit = parseUnit("phony_map_literal.dart", "var x = <int>{'a':1,'b':2,'c':3};");
     List<DartNode> nodes = unit.getTopLevelNodes();
     assertEquals(1, nodes.size());
     DartFieldDefinition f = (DartFieldDefinition)nodes.get(0);
-    DartField fieldX = (DartField)f.getFields().get(0);
+    DartField fieldX = f.getFields().get(0);
     DartMapLiteral map = (DartMapLiteral) fieldX.getValue();
     assertEquals(3, map.getEntries().size());
     assertEquals(1, ((DartIntegerLiteral) (map.getEntries().get(0)).getValue()).getValue()
         .intValue());
   }
 }