Issue 250: Allow for GNU formatted errors

compiler/java/com/google/dart/compiler/DefaultDartCompilerListener.java

Index: compiler/java/com/google/dart/compiler/DefaultDartCompilerListener.java
diff --git a/compiler/java/com/google/dart/compiler/DefaultDartCompilerListener.java b/compiler/java/com/google/dart/compiler/DefaultDartCompilerListener.java
index bd9a5a4b5a01fe7072383135c42cee568a1b99f3..51a6739f2e91d9ea68588010cd5cdf1a2260cf73 100644
--- a/compiler/java/com/google/dart/compiler/DefaultDartCompilerListener.java
+++ b/compiler/java/com/google/dart/compiler/DefaultDartCompilerListener.java
@@ -4,6 +4,7 @@
 
 package com.google.dart.compiler;
 
+import com.google.dart.compiler.CompilerConfiguration.ErrorFormat;
 import com.google.dart.compiler.ast.DartUnit;
 
 import java.io.PrintStream;
@@ -35,15 +36,15 @@ public class DefaultDartCompilerListener extends DartCompilerListener {
    */
   protected final ErrorFormatter formatter;
 
-  public DefaultDartCompilerListener(boolean printMachineProblems) {
-    this(System.err, printMachineProblems);
+  public DefaultDartCompilerListener(ErrorFormat errorFormat) {
+    this(System.err, errorFormat);
   }
 
   /**
    * @param outputStream the {@link PrintStream} to use for {@link ErrorFormatter}.
    */
-  public DefaultDartCompilerListener(PrintStream outputStream, boolean printMachineProblems) {
-    formatter = new  PrettyErrorFormatter(outputStream, useColor(), printMachineProblems);
+  public DefaultDartCompilerListener(PrintStream outputStream, ErrorFormat errorFormat) {
+    formatter = new  PrettyErrorFormatter(outputStream, useColor(), errorFormat);
   }
 
   @Override