Intern AST and Model names to reduce char[]/String waste.

compiler/java/com/google/dart/compiler/ast/DartCommentRefName.java

Index: compiler/java/com/google/dart/compiler/ast/DartCommentRefName.java
diff --git a/compiler/java/com/google/dart/compiler/ast/DartCommentRefName.java b/compiler/java/com/google/dart/compiler/ast/DartCommentRefName.java
index 52c133e643f1ebaf0f136ec83d094ed5ad006027..95a1bbd6fb721ecd7a95d79561c992a579118166 100644
--- a/compiler/java/com/google/dart/compiler/ast/DartCommentRefName.java
+++ b/compiler/java/com/google/dart/compiler/ast/DartCommentRefName.java
@@ -5,6 +5,7 @@
 package com.google.dart.compiler.ast;
 
 import com.google.dart.compiler.resolver.Element;
+import com.google.dart.compiler.util.StringInterner;
 
 /**
  * <code>[name]</code> in {@link DartComment}.
@@ -15,7 +16,7 @@ public final class DartCommentRefName extends DartNode {
 
   public DartCommentRefName(String name) {
     assert name != null;
-    this.name = name;
+    this.name = StringInterner.intern(name);
   }
 
   @Override