Restore CompilationUnit.lineInfo in Java and Dart.

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

Index: editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/CompilationUnit.java
diff --git a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/CompilationUnit.java b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/CompilationUnit.java
index d75e5a9d5212c7ffacc53103ac71b84867c997e1..5a2fd63e8e2ec555ff3618b652c898ac99080ed1 100644
--- a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/CompilationUnit.java
+++ b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/ast/CompilationUnit.java
@@ -16,6 +16,7 @@ package com.google.dart.engine.ast;
 import com.google.dart.engine.element.CompilationUnitElement;
 import com.google.dart.engine.scanner.Token;
 import com.google.dart.engine.scanner.TokenType;
+import com.google.dart.engine.utilities.source.LineInfo;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -82,6 +83,11 @@ public class CompilationUnit extends ASTNode {
   private CompilationUnitElement element;
 
   /**
+   * The line information for this compilation unit.
+   */
+  private LineInfo lineInfo;
+
+  /**
    * Initialize a newly created compilation unit to have the given directives and declarations.
    * 
    * @param beginToken the first token in the token stream
@@ -151,6 +157,15 @@ public class CompilationUnit extends ASTNode {
     return endToken.getOffset() + endToken.getLength();
   }
 
+  /**
+   * Return the line information for this compilation unit.
+   * 
+   * @return the line information for this compilation unit
+   */
+  public LineInfo getLineInfo() {
+    return lineInfo;
+  }
+
   @Override
   public int getOffset() {
     return 0;
@@ -176,6 +191,15 @@ public class CompilationUnit extends ASTNode {
   }
 
   /**
+   * Set the line information for this compilation unit to the given line information.
+   * 
+   * @param errors the line information to associate with this compilation unit
+   */
+  public void setLineInfo(LineInfo lineInfo) {
+    this.lineInfo = lineInfo;
+  }
+
+  /**
    * Set the script tag at the beginning of the compilation unit to the given script tag.
    * 
    * @param scriptTag the script tag at the beginning of the compilation unit