Rename DartMetadata in preparation for supporting real metadata

compiler/java/com/google/dart/compiler/ast/DartMetadata.java

Index: compiler/java/com/google/dart/compiler/ast/DartMetadata.java
===================================================================
--- compiler/java/com/google/dart/compiler/ast/DartMetadata.java	(revision 10855)
+++ compiler/java/com/google/dart/compiler/ast/DartMetadata.java	(working copy)
@@ -1,35 +0,0 @@
-// 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.ast;
-
-/**
- * Some metadata information attached to the {@link DartDeclaration}.
- */
-public class DartMetadata {
-  public static final DartMetadata EMPTY = new DartMetadata(false, false);
-  private boolean deprecated;
-  private boolean override;
-
-  private DartMetadata(boolean deprecated, boolean override) {
-    this.deprecated = deprecated;
-    this.override = override;
-  }
-
-  public DartMetadata makeDeprecated() {
-    return new DartMetadata(true, override);
-  }
-
-  public DartMetadata makeOverride() {
-    return new DartMetadata(deprecated, true);
-  }
-
-  public boolean isDeprecated() {
-    return deprecated;
-  }
-
-  public boolean isOverride() {
-    return override;
-  }
-}