Make CompilerTask independent of compiler.

pkg/compiler/lib/src/parser/parser_task.dart

Index: pkg/compiler/lib/src/parser/parser_task.dart
diff --git a/pkg/compiler/lib/src/parser/parser_task.dart b/pkg/compiler/lib/src/parser/parser_task.dart
index 6470d1f83386991b3063038c6fa6f8f0453061f6..02c37195b87c3fbb11fc2bd21ca971f11ee28773 100644
--- a/pkg/compiler/lib/src/parser/parser_task.dart
+++ b/pkg/compiler/lib/src/parser/parser_task.dart
@@ -19,8 +19,11 @@ import 'parser.dart' show Parser;
 
 class ParserTask extends CompilerTask {
   final ParserOptions parserOptions;
+  final Compiler compiler;
 
-  ParserTask(Compiler compiler, this.parserOptions) : super(compiler);
+  ParserTask(Compiler compiler, this.parserOptions)
+      : compiler = compiler,
+        super(compiler.measurer);
 
   String get name => 'Parser';
 
@@ -31,7 +34,7 @@ class ParserTask extends CompilerTask {
   Node parseCompilationUnit(Token token) {
     return measure(() {
       NodeListener listener =
-          new NodeListener(const ScannerOptions(), reporter, null);
+          new NodeListener(const ScannerOptions(), compiler.reporter, null);
       Parser parser = new Parser(listener, parserOptions);
       try {
         parser.parseUnit(token);