Eliminate the const constructor from the Expando class.

tests/corelib/expando_test.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.
 
-const Expando<int> visits = const Expando<int>('visits');
+class ExpandoTest {
+  static Expando<int> visits;
 
-main() {
-  var legal = [ new Object(),
-                new List(), [1,2,3], const [1,2,3],
-                new Map(), {'x':1,'y':2}, const {'x':1,'y':2},
-                new Expando(), new Expando('horse') ];
-  for (var object in legal) {
-    testNamedExpando(object);
-    testUnnamedExpando(object);
-    testConstExpando(object);
+  static testMain() {
+    visits = new Expando<int>('visits');
+    var legal = [ new Object(),
+                  new List(), [1,2,3], const [1,2,3],
+                  new Map(), {'x':1,'y':2}, const {'x':1,'y':2},
+                  new Expando(), new Expando('horse') ];
+    for (var object in legal) {
+      testNamedExpando(object);
+      testUnnamedExpando(object);
+    }
+    for (var object in legal) {
+      Expect.equals(2, visits[object]);
+    }
+    testIllegal();
   }
-  for (var object in legal) {
-    Expect.equals(3, visits[object]);
+
+  static visit(object) {
+    int count = visits[object];
+    count = (count === null) ? 1 : count + 1;
+    visits[object] = count;
   }
-  testIllegal();
+
+  static testNamedExpando(object) {
+    Expando<int> expando = new Expando<int>('myexpando');
+    Expect.equals('myexpando', expando.name);
+    Expect.isTrue(expando.toString().startsWith('Expando:myexpando'));
+    testExpando(expando, object);
+  }
+
+  static testUnnamedExpando(object) {
+    Expando<int> expando = new Expando<int>();
+    Expect.isNull(expando.name);
+    Expect.isTrue(expando.toString().startsWith('Expando:'));
+    testExpando(expando, object);
+  }
+
+  static testExpando(Expando<int> expando, object) {
+    visit(object);
+
+    Expect.isNull(expando[object]);
+    expando[object] = 42;
+    Expect.equals(42, expando[object]);
+    expando[object] = null;
+    Expect.isNull(expando[object]);
+
+    Expando<int> alternative = new Expando('myexpando');
+    Expect.isNull(alternative[object]);
+    alternative[object] = 87;
+    Expect.isNull(expando[object]);
+    expando[object] = 99;
+    Expect.equals(99, expando[object]);
+    Expect.equals(87, alternative[object]);
+  }
+
+  static testIllegal() {
+    Expando<int> expando = new Expando<int>();
+    Expect.throws(() => expando[null], (exception)
+                  => exception is NullPointerException);
+    Expect.throws(() => expando['string'], (exception)
+                  => exception is IllegalArgumentException);
+    Expect.throws(() => expando['string'], (exception)
+                  => exception is IllegalArgumentException);
+    Expect.throws(() => expando[42], (exception)
+                  => exception is IllegalArgumentException);
+    Expect.throws(() => expando[42.87], (exception)
+                  => exception is IllegalArgumentException);
+    Expect.throws(() => expando[true], (exception)
+                  => exception is IllegalArgumentException);
+    Expect.throws(() => expando[false], (exception)
+                  => exception is IllegalArgumentException);
+  }
 }
 
-visit(object) {
-  int count = visits[object];
-  count = (count === null) ? 1 : count + 1;
-  visits[object] = count;
-}
-
-testNamedExpando(object) {
-  Expando<int> expando = new Expando<int>('myexpando');
-  Expect.equals('myexpando', expando.name);
-  Expect.isTrue(expando.toString().startsWith('Expando:myexpando'));
-  testExpando(expando, object);
-}
-
-testUnnamedExpando(object) {
-  Expando<int> expando = new Expando<int>();
-  Expect.isNull(expando.name);
-  Expect.isTrue(expando.toString().startsWith('Expando:'));
-  testExpando(expando, object);
-}
-
-testExpando(Expando<int> expando, object) {
-  visit(object);
-
-  Expect.isNull(expando[object]);
-  expando[object] = 42;
-  Expect.equals(42, expando[object]);
-  expando[object] = null;
-  Expect.isNull(expando[object]);
-
-  Expando<int> alternative = new Expando('myexpando');
-  Expect.isNull(alternative[object]);
-  alternative[object] = 87;
-  Expect.isNull(expando[object]);
-  expando[object] = 99;
-  Expect.equals(99, expando[object]);
-  Expect.equals(87, alternative[object]);
-}
-
-testConstExpando(object) {
-  visit(object);
-
-  var e0 = const Expando<int>('horse');
-  var e1 = const Expando<int>('horse');
-  var e2 = new Expando<int>('horse');
-  var e3 = new Expando<int>('horse');
-
-  e0[object] = 0;
-  Expect.equals(0, e0[object]);
-
-  e1[object] = 1;
-  Expect.equals(1, e0[object]);
-  Expect.equals(1, e1[object]);
-
-  e2[object] = 2;
-  Expect.equals(1, e0[object]);
-  Expect.equals(1, e1[object]);
-  Expect.equals(2, e2[object]);
-
-  e3[object] = 3;
-  Expect.equals(1, e0[object]);
-  Expect.equals(1, e1[object]);
-  Expect.equals(2, e2[object]);
-  Expect.equals(3, e3[object]);
-
-  e0[object] = null;
-  Expect.isNull(e0[object]);
-  Expect.isNull(e1[object]);
-  Expect.equals(2, e2[object]);
-  Expect.equals(3, e3[object]);
-}
-
-testIllegal() {
-  Expando<int> expando = new Expando<int>();
-  Expect.throws(() => expando[null], (exception)
-      => exception is NullPointerException);
-  Expect.throws(() => expando['string'], (exception)
-      => exception is IllegalArgumentException);
-  Expect.throws(() => expando['string'], (exception)
-      => exception is IllegalArgumentException);
-  Expect.throws(() => expando[42], (exception)
-      => exception is IllegalArgumentException);
-  Expect.throws(() => expando[42.87], (exception)
-      => exception is IllegalArgumentException);
-  Expect.throws(() => expando[true], (exception)
-      => exception is IllegalArgumentException);
-  Expect.throws(() => expando[false], (exception)
-      => exception is IllegalArgumentException);
-}
+main() => ExpandoTest.testMain();