Fixes for parsing warnigs, issue 1060.

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

Index: compiler/java/com/google/dart/compiler/ast/DartUnit.java
diff --git a/compiler/java/com/google/dart/compiler/ast/DartUnit.java b/compiler/java/com/google/dart/compiler/ast/DartUnit.java
index 292b028a156b8d8c73e6db2beb5cc65f2a79b56d..400a65c1f3f3a739ef6680761f0601f732874729 100644
--- a/compiler/java/com/google/dart/compiler/ast/DartUnit.java
+++ b/compiler/java/com/google/dart/compiler/ast/DartUnit.java
@@ -23,13 +23,14 @@ public class DartUnit extends DartNode {
   private List<DartDirective> directives;
   private final List<DartNode> topLevelNodes = Lists.newArrayList();
   private final DartSource source;
+  private final boolean isDiet;
   /** A list of comments. May be null. */
   private List<DartComment> comments;
-  private boolean isDiet;
   private String dietParse;
 
-  public DartUnit(DartSource source) {
+  public DartUnit(DartSource source, boolean isDiet) {
     this.source = source;
+    this.isDiet = isDiet;
   }
 
   public void addTopLevelNode(DartNode node) {
@@ -103,13 +104,6 @@ public class DartUnit extends DartNode {
   }
 
   /**
-   * Sets this unit to be a diet unit, meaning it contains no method bodies.
-   */
-  public void setDiet(boolean isDiet) {
-    this.isDiet = isDiet;
-  }
-
-  /**
    * Whether this is an diet unit, meaning it contains no method bodies.
    */
   public boolean isDiet() {