Generate hashcode on the java types.

editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/Element.java

Index: editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/Element.java
diff --git a/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/Element.java b/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/Element.java
index 5352f80dbe6c38e86b3d5cbaaf360d16fe0d2827..d8fcc3bf3ad3952e3fa609731ed5086518843b71 100644
--- a/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/Element.java
+++ b/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/Element.java
@@ -26,6 +26,7 @@ import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonPrimitive;
+import org.apache.commons.lang3.builder.HashCodeBuilder;
 import java.util.ArrayList;
 import java.util.Iterator;
 import org.apache.commons.lang3.StringUtils;
@@ -195,6 +196,18 @@ public class Element {
     return returnType;
   }
 
+  @Override
+  public int hashCode() {
+    HashCodeBuilder builder = new HashCodeBuilder();
+    builder.append(kind);
+    builder.append(name);
+    builder.append(location);
+    builder.append(flags);
+    builder.append(parameters);
+    builder.append(returnType);
+    return builder.toHashCode();
+  }
+
   public boolean isAbstract() {
     return (flags & ABSTRACT) != 0;
   }