Support JSON output for pub build.

editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/utilities/ast/AstComparator.java

Index: editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/utilities/ast/AstComparator.java
diff --git a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/utilities/ast/AstComparator.java b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/utilities/ast/AstComparator.java
index d35ce630a07221ec4bcc2bdf0ca30412636f642b..89b69d749ff207db903c904fe2e7eb88f0b61314 100644
--- a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/utilities/ast/AstComparator.java
+++ b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/utilities/ast/AstComparator.java
@@ -1,11 +1,11 @@
 /*
  * Copyright (c) 2013, 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
  * or implied. See the License for the specific language governing permissions and limitations under
@@ -24,7 +24,7 @@ import com.google.dart.engine.utilities.general.ObjectUtilities;
 public class AstComparator implements AstVisitor<Boolean> {
   /**
    * Return {@code true} if the two AST nodes are equal.
-   * 
+   *
    * @param first the first node being compared
    * @param second the second node being compared
    * @return {@code true} if the two AST nodes are equal
@@ -948,7 +948,7 @@ public class AstComparator implements AstVisitor<Boolean> {
   /**
    * Return {@code true} if the given lists of AST nodes have the same size and corresponding
    * elements are equal.
-   * 
+   *
    * @param first the first node being compared
    * @param second the second node being compared
    * @return {@code true} if the given AST nodes have the same size and corresponding elements are
@@ -974,7 +974,7 @@ public class AstComparator implements AstVisitor<Boolean> {
 
   /**
    * Return {@code true} if the given AST nodes have the same structure.
-   * 
+   *
    * @param first the first node being compared
    * @param second the second node being compared
    * @return {@code true} if the given AST nodes have the same structure
@@ -994,7 +994,7 @@ public class AstComparator implements AstVisitor<Boolean> {
   /**
    * Return {@code true} if the given arrays of tokens have the same length and corresponding
    * elements are equal.
-   * 
+   *
    * @param first the first node being compared
    * @param second the second node being compared
    * @return {@code true} if the given arrays of tokens have the same length and corresponding
@@ -1015,7 +1015,7 @@ public class AstComparator implements AstVisitor<Boolean> {
 
   /**
    * Return {@code true} if the given tokens have the same structure.
-   * 
+   *
    * @param first the first node being compared
    * @param second the second node being compared
    * @return {@code true} if the given tokens have the same structure