Remove HRuntimeType scheme for function types.

tests/compiler/dart2js/mock_libraries.dart

 // Copyright (c) 2014, 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 for creating mock versions of platform and internal libraries.
 
 library mock_libraries;
 
 const DEFAULT_PLATFORM_CONFIG = """
 [libraries]
@@ skipping 165 matching lines @@
   'doubleTypeCheck': 'doubleTypeCheck(value) {}',
   'functionSubtypeCast':
       r'''functionSubtypeCast(Object object, String signatureName,
                               String contextName, var context) {}''',
   'functionTypeTestMetaHelper': r'''
       functionTypeTestMetaHelper() {
         buildFunctionType(null, null, null);
         buildNamedFunctionType(null, null, null);
         buildInterfaceType(null, null);
       }''',
+  'functionTypeTest': r'functionTypeTest(f, t) {}',
+  'functionTypeCast': r'functionTypeCast(f, t) { return f; }',
+  'functionTypeCheck': r'functionTypeCheck(f, t) { return f; }',
   'getFallThroughError': 'getFallThroughError() {}',
   'getIsolateAffinityTag': 'getIsolateAffinityTag(_) {}',
   'getRuntimeTypeArgument':
       'getRuntimeTypeArgument(target, substitutionName, index) {}',
   'getRuntimeTypeArguments':
       'getRuntimeTypeArguments(target, substitutionName) {}',
   'getRuntimeTypeInfo': 'getRuntimeTypeInfo(a) {}',
   'getTraceFromException': 'getTraceFromException(exception) {}',
   'getTypeArgumentByIndex': 'getTypeArgumentByIndex(target, index) {}',
   'GeneralConstantMap': 'class GeneralConstantMap {}',
@@ skipping 263 matching lines @@
 
     const LookupMap(this._entries, [this._nestedMaps = const []])
         : _key = null, _value = null;
 
     const LookupMap.pair(this._key, this._value)
         : _entries = const [], _nestedMaps = const [];
     V operator[](K k) => null;
   }''',
   '_version': 'const _version = "0.0.1+1";',
 };