Add support for metadata annotation syntax (issue 4056)

compiler/java/com/google/dart/compiler/resolver/MethodElementImplementation.java

 // 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.
 
 package com.google.dart.compiler.resolver;
 
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.collect.ImmutableSet;
 import com.google.dart.compiler.ast.DartBlock;
 import com.google.dart.compiler.ast.DartClass;
@@ skipping 37 matching lines @@
       this.nameLocation = node.getName().getSourceInfo();
     } else {
       this.nameLocation = SourceInfo.UNKNOWN;
     }
   }
 
   protected MethodElementImplementation(DartMethodDefinition node, String name,
                                         EnclosingElement holder) {
     super(node, name);
     if (node != null) {
-      this.metadata = node.getMetadata();
+      this.metadata = node.getObsoleteMetadata();
       this.modifiers = node.getModifiers();
       this.nameLocation = node.getName().getSourceInfo();
       DartBlock body = node.getFunction().getBody();
       this.hasBody = body != null && !(body instanceof DartNativeBlock);
     } else {
       this.metadata = DartObsoleteMetadata.EMPTY;
       this.modifiers = Modifiers.NONE;
       this.nameLocation = SourceInfo.UNKNOWN;
       this.hasBody = false;
     }
@@ skipping 119 matching lines @@
   }
 
   public void setOverridden(Set<Element> overridden) {
     this.overridden = overridden;
   }
   
   public Set<Element> getOverridden() {
     return overridden;
   }
 }