Annotate native methods.

pkg/front_end/lib/src/fasta/source/source_loader.dart

 // Copyright (c) 2016, 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 fasta.source_loader;
 
 import 'dart:async' show
     Future;
 
 import 'dart:io' show
@@ skipping 234 matching lines @@
   }
 
   void finishTypeVariables(ClassBuilder object) {
     int count = 0;
     builders.forEach((Uri uri, LibraryBuilder library) {
       count += library.finishTypeVariables(object);
     });
     ticker.logMs("Resolved $count type-variable bounds");
   }
 
+  void finishNativeMethods() {
+    int count = 0;
+    builders.forEach((Uri uri, LibraryBuilder library) {
+      count += library.finishNativeMethods();
+    });
+    ticker.logMs("Finished $count native methods");
+  }
+
   /// Returns all the supertypes (including interfaces) of [cls]
   /// transitively. Includes [cls].
   Set<ClassBuilder> allSupertypes(ClassBuilder cls) {
     int length = 0;
     Set<ClassBuilder> result = new Set<ClassBuilder>()..add(cls);
     while (length != result.length) {
       length = result.length;
       result.addAll(directSupertypes(result));
     }
     return result;
@@ skipping 81 matching lines @@
     ticker.logMs("Built analyzer element model.");
   }
 
   void computeHierarchy(Program program) {
     hierarchy = new ClassHierarchy(program);
     ticker.logMs("Computed class hierarchy");
     coreTypes = new CoreTypes(program);
     ticker.logMs("Computed core types");
   }
 }