Fix type mismatch errors. Environments do not only contain strings.

tests/standalone/src/StatusExpressionTest.dart

 // 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.
 
 #library("StatusExpressionTest");
 
 #import("../../../tools/testing/dart/status_expression.dart");
 
 
 class StatusExpressionTest {
@@ skipping 13 matching lines @@
     Expect.listEquals(tokenizer.tokens,
         ["\$", "mode", "==", "debug", "&&", "(", "\$", "arch", "==",
          "chromium", "||", "\$", "arch", "==", "dartc", ")"]);
     ExpressionParser parser =
         new ExpressionParser(new Scanner(tokenizer.tokens));
     BooleanExpression ast = parser.parseBooleanExpression();
     Expect.equals(
         @"(($mode == debug) && (($arch == chromium) || ($arch == dartc)))",
         ast.toString());
     // Test BooleanExpression.evaluate().
-    Map<String, String> environment = new Map<String, String>();
+    Map environment = new Map();
     environment["arch"] = "dartc";
     environment["mode"] = "debug";
     Expect.isTrue(ast.evaluate(environment));
     environment["mode"] = "release";
     Expect.isFalse(ast.evaluate(environment));
     environment["arch"] = "ia32";
     Expect.isFalse(ast.evaluate(environment));
     environment["mode"] = "debug";
     Expect.isFalse(ast.evaluate(environment));
     environment["arch"] = "chromium";
@@ skipping 42 matching lines @@
     tokenizer.tokenize();
     ExpressionParser parser =
         new ExpressionParser(new Scanner(tokenizer.tokens));
     SetExpression ast = parser.parseSetExpression();
     Expect.equals(
         @"((Skip || (Pass if ($arch == dartc))) || ((Fail || Timeout) " +
         @"if (($arch == chromium) && ($mode == release))))",
         ast.toString());
 
     // Test SetExpression.evaluate().
-    Map<String, String> environment = new Map<String, String>();
+    Map environment = new Map();
     environment["arch"] = "ia32";
     environment["checked"] = true;
     environment["mode"] = "debug";
     Set<String> result = ast.evaluate(environment);
     Expect.setEquals(["Skip"], result);
 
     environment["arch"] = "dartc";
     result = ast.evaluate(environment);
     Expect.setEquals(["Skip", "Pass"], result);
 
@@ skipping 11 matching lines @@
       @"  $arch == ia32 && $checked || $mode == release    ");
     tokenizer.tokenize();
     ExpressionParser parser =
         new ExpressionParser(new Scanner(tokenizer.tokens));
     BooleanExpression ast = parser.parseBooleanExpression();
     Expect.equals(
         @"((($arch == ia32) && (bool $checked)) || ($mode == release))",
         ast.toString());
 
     // Test BooleanExpression.evaluate().
-    Map<String, String> environment = new Map<String, String>();
+    Map environment = new Map();
     environment["arch"] = "ia32";
     environment["checked"] = true;
     environment["mode"] = "debug";
     Expect.isTrue(ast.evaluate(environment));
     environment["mode"] = "release";
     Expect.isTrue(ast.evaluate(environment));
     environment["checked"] = false;
     Expect.isTrue(ast.evaluate(environment));
     environment["mode"] = "debug";
     Expect.isFalse(ast.evaluate(environment));
     environment["arch"] = "arm";
     Expect.isFalse(ast.evaluate(environment));
     environment["checked"] = true;
     Expect.isFalse(ast.evaluate(environment));    
   }
 }  
 
 main() {
   StatusExpressionTest.testMain();
 }