Issue 3753. Support for @deprecated annotation

compiler/java/com/google/dart/compiler/resolver/ElementMap.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.dart.compiler.ast.DartMetadata;
 import com.google.dart.compiler.ast.DartNode;
 import com.google.dart.compiler.ast.Modifiers;
 import com.google.dart.compiler.common.SourceInfo;
 import com.google.dart.compiler.type.Type;
 
 import java.util.ArrayList;
 import java.util.List;
 
 /**
  * A more efficient version of {@link com.google.common.collect.Multimap} specifically for
@@ skipping 28 matching lines @@
     public EnclosingElement getEnclosingElement() {
       throw new AssertionError(INTERNAL_ONLY_ERROR);
     }
 
     @Override
     public ElementKind getKind() {
       throw new AssertionError(INTERNAL_ONLY_ERROR);
     }
 
     @Override
+    public DartMetadata getMetadata() {
+      throw new AssertionError(INTERNAL_ONLY_ERROR);
+    }
+
+    @Override
     public Modifiers getModifiers() {
       throw new AssertionError(INTERNAL_ONLY_ERROR);
     }
 
     @Override
     public String getName() {
       return name;
     }
 
     @Override
@@ skipping 179 matching lines @@
     int probe = name.hashCode() & mask;
     for (int i = probe; i < probe + mask + 1; i++) {
       element = elements[i & mask];
       if (element == null || element.getName().equals(name)) {
         return element;
       }
     }
     throw new AssertionError("overfilled array");
   }
 }