MalformedType used for all invalid type annotations.

tests/compiler/dart2js/resolver_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.
 
 import 'dart:uri';
 
 import "../../../sdk/lib/_internal/compiler/implementation/dart2jslib.dart"
        hide TreeElementMapping, TreeElements, SourceString;
 import "../../../sdk/lib/_internal/compiler/implementation/resolution/resolution.dart";
 import "../../../sdk/lib/_internal/compiler/implementation/elements/elements.dart";
@@ skipping 375 matching lines @@
   Expect.equals(expected, actual);
 }
 
 testTypeAnnotation() {
   MockCompiler compiler = new MockCompiler();
   String statement = "Foo bar;";
 
   // Test that we get a warning when Foo is not defined.
   Map mapping = compiler.resolveStatement(statement).map;
 
-  Expect.equals(1, mapping.length); // bar has an element.
+  Expect.equals(2, mapping.length); // Both Foo and bar have an element.
   Expect.equals(1, compiler.warnings.length);
 
   Node warningNode = compiler.warnings[0].node;
 
   Expect.equals(
       new Message(MessageKind.CANNOT_RESOLVE_TYPE, ['Foo']),
       compiler.warnings[0].message);
   VariableDefinitions definition = compiler.parsedTree;
   Expect.equals(warningNode, definition.type);
   compiler.clearWarnings();
@@ skipping 400 matching lines @@
         var d = new D();
         --d;
       }""";
   final compiler = compileScript(script);
 
   checkMemberResolved(compiler, 'A', operatorName('+', false));
   checkMemberResolved(compiler, 'B', operatorName('+', false));
   checkMemberResolved(compiler, 'C', operatorName('-', false));
   checkMemberResolved(compiler, 'D', operatorName('-', false));
 }