Big merge from experimental to bleeding edge.

editor/tools/plugins/com.google.dart.tools.ui.web/src/com/google/dart/tools/ui/web/utils/Node.java

 /*
  * Copyright (c) 2012, the Dart project authors.
  * 
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  * 
  * http://www.eclipse.org/legal/epl-v10.html
  * 
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
@@ skipping 23 matching lines @@
   public Node(String label) {
     this.label = label;
   }
 
   public void addChild(Node child) {
     child.setParent(this);
 
     children.add(child);
   }
 
-  @Override
-  public boolean equals(Object obj) {
-    if (obj == null) {
-      return false;
-    }
-
-    if (this.getClass().isAssignableFrom(obj.getClass())) {
-      Node other = (Node) obj;
-
-      return safeEquals(getId(), other.getId());
-    } else {
-      return false;
-    }
-  }
-
   public List<Node> getChildren() {
     return children;
   }
 
   public Token getEndToken() {
     return endToken;
   }
 
-  public String getId() {
-    if (parent == null) {
-      return label;
-    } else {
-      return parent.getId() + "." + label;
-    }
-  }
-
   public String getLabel() {
     return label;
   }
 
   public Node getParent() {
     return parent;
   }
 
   public Token getStartToken() {
     return startToken;
   }
 
-  @Override
-  public int hashCode() {
-    return getId().hashCode();
-  }
-
   public void setEnd(Token t) {
     this.endToken = t;
   }
 
   public void setParent(Node parent) {
     this.parent = parent;
   }
 
   public void setStart(Token t) {
     this.startToken = t;
   }
 
   @Override
   public String toString() {
     return getLabel();
   }
 
-  private boolean safeEquals(String id, String id2) {
-    if (id == id2) {
-      return true;
-    }
-
-    if (id == null) {
-      return false;
-    }
-
-    return id.equals(id2);
-  }
-
 }