Generate hashcode on the java types.

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

Index: editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/Location.java
diff --git a/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/Location.java b/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/Location.java
index 1cd5c6fec3a57d6186f4769e2a4d4797934ab5af..96f992fd8e4c6f51bfb1ad3192bf43bb8ac56e2b 100644
--- a/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/Location.java
+++ b/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/Location.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;
@@ -148,6 +149,17 @@ public class Location {
     return startLine;
   }
 
+  @Override
+  public int hashCode() {
+    HashCodeBuilder builder = new HashCodeBuilder();
+    builder.append(file);
+    builder.append(offset);
+    builder.append(length);
+    builder.append(startLine);
+    builder.append(startColumn);
+    return builder.toHashCode();
+  }
+
   public JsonObject toJson() {
     JsonObject jsonObject = new JsonObject();
     jsonObject.addProperty("file", file);