Add CoreTypes interface.

pkg/compiler/lib/src/patch_parser.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.
 
 /**
  * This library contains the infrastructure to parse and integrate patch files.
  *
  * Three types of elements can be patched: [LibraryElement], [ClassElement],
  * [FunctionElement]. Patches are introduced in patch libraries which are loaded
  * together with the corresponding origin library. Which libraries that are
@@ skipping 361 matching lines @@
         return true;
       }
     }
     return false;
   }
 
   void validate(Compiler compiler,
                 Element element,
                 MetadataAnnotation annotation,
                 ConstantValue constant) {
-    if (constant.computeType(compiler).element !=
+    if (constant.getType(compiler.coreTypes).element !=
             compiler.nativeAnnotationClass) {
       compiler.internalError(annotation, 'Invalid @Native(...) annotation.');
     }
   }
 }
 
 /// Annotation handler for pre-resolution detection of `@patch` annotations.
 class PatchAnnotationHandler implements EagerAnnotationHandler {
   const PatchAnnotationHandler();
 
@@ skipping 111 matching lines @@
         "Trying to patch a function more than once.");
   }
   origin.applyPatch(patch);
 }
 
 // TODO(johnniwinther): Add unittest when patch is (real) metadata.
 bool isPatchElement(Compiler compiler, Element element) {
   return EagerAnnotationHandler.checkAnnotation(compiler, element,
       const PatchAnnotationHandler());
 }