Use Element instead of Symbol.

compiler/java/com/google/dart/compiler/common/Symbol.java

Index: compiler/java/com/google/dart/compiler/common/Symbol.java
diff --git a/compiler/java/com/google/dart/compiler/common/Symbol.java b/compiler/java/com/google/dart/compiler/common/Symbol.java
deleted file mode 100644
index 78c20ad76d8c2e949f5e17abadcce5db4a96b623..0000000000000000000000000000000000000000
--- a/compiler/java/com/google/dart/compiler/common/Symbol.java
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright (c) 2011, 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.common;
-
-import com.google.dart.compiler.ast.DartNode;
-
-/**
- * @author johnlenz@google.com (John Lenz)
- */
-public interface Symbol {
-  String getOriginalSymbolName();
-
-  DartNode getNode();
-}