Extract DiagnosticReporter implementation from Compiler.

pkg/compiler/lib/src/cps_ir/scalar_replacement.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 library dart2js.cps_ir.scalar_replacement;
 
 import 'optimizers.dart';
 
 import 'dart:collection' show Queue;
 
 import '../closure.dart' show
@@ skipping 25 matching lines @@
  * Replaces aggregates with a set of local values.  Performs inlining of
  * single-use closures to generate more replacable aggregates.
  */
 class ScalarReplacer extends Pass {
   String get passName => 'Scalar replacement';
 
   final dart2js.InternalErrorFunction _internalError;
   final World _classWorld;
 
   ScalarReplacer(dart2js.Compiler compiler)
-      : _internalError = compiler.internalError,
+      : _internalError = compiler.reporter.internalError,
         _classWorld = compiler.world;
 
   @override
   void rewrite(FunctionDefinition root) {
     // Set all parent pointers.
     new ParentVisitor().visit(root);
     ScalarReplacementVisitor analyzer =
         new ScalarReplacementVisitor(_internalError, _classWorld);
     analyzer.analyze(root);
     analyzer.process();
@@ skipping 179 matching lines @@
 class ScalarReplacementRemovalVisitor extends RecursiveVisitor {
   ScalarReplacementVisitor process;
 
   ScalarReplacementRemovalVisitor(this.process);
 
   processReference(Reference reference) {
     process.reconsider(reference.definition);
     reference.unlink();
   }
 }