Rename DartMetadata in preparation for supporting real metadata

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

Index: compiler/java/com/google/dart/compiler/ast/DartObsoleteMetadata.java
===================================================================
--- compiler/java/com/google/dart/compiler/ast/DartObsoleteMetadata.java	(revision 0)
+++ compiler/java/com/google/dart/compiler/ast/DartObsoleteMetadata.java	(revision 0)
@@ -0,0 +1,36 @@
+// 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}. This has been superseded by
+ * the metadata defined in the specification and will be removed in the near future.
+ */
+public class DartObsoleteMetadata {
+  public static final DartObsoleteMetadata EMPTY = new DartObsoleteMetadata(false, false);
+  private boolean deprecated;
+  private boolean override;
+
+  private DartObsoleteMetadata(boolean deprecated, boolean override) {
+    this.deprecated = deprecated;
+    this.override = override;
+  }
+
+  public DartObsoleteMetadata makeDeprecated() {
+    return new DartObsoleteMetadata(true, override);
+  }
+
+  public DartObsoleteMetadata makeOverride() {
+    return new DartObsoleteMetadata(deprecated, true);
+  }
+
+  public boolean isDeprecated() {
+    return deprecated;
+  }
+
+  public boolean isOverride() {
+    return override;
+  }
+}