Extract DiagnosticReporter implementation from Compiler.

pkg/compiler/lib/src/js_emitter/startup_emitter/model_emitter.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.js_emitter.startup_emitter.model_emitter;
 
 import 'dart:convert' show JsonEncoder;
 
 import '../../common.dart';
 
@@ skipping 13 matching lines @@
 
 import '../../io/source_map_builder.dart' show
     SourceMapBuilder;
 
 import '../../js/js.dart' as js;
 import '../../js_backend/js_backend.dart' show
     JavaScriptBackend,
     Namer,
     ConstantEmitter;
 
+import '../../diagnostics/diagnostic_listener.dart' show
+    DiagnosticReporter;
+
 import '../../diagnostics/spannable.dart' show
     NO_LOCATION_SPANNABLE;
 
 import '../../util/uri_extras.dart' show
     relativize;
 
 import '../headers.dart';
 import '../js_emitter.dart' show NativeEmitter;
 
 import 'package:js_runtime/shared/embedded_names.dart' show
@@ skipping 49 matching lines @@
 
   ModelEmitter(Compiler compiler, Namer namer, this.nativeEmitter,
                this.shouldGenerateSourceMap)
       : this.compiler = compiler,
         this.namer = namer {
     this.constantEmitter = new ConstantEmitter(
         compiler, namer, this.generateConstantReference,
         constantListGenerator);
   }
 
+  DiagnosticReporter get reporter => compiler.reporter;
+
   js.Expression constantListGenerator(js.Expression array) {
     // TODO(floitsch): remove hard-coded name.
     return js.js('makeConstList(#)', [array]);
   }
 
   js.Expression generateEmbeddedGlobalAccess(String global) {
     return js.js(generateEmbeddedGlobalAccessString(global));
   }
 
   String generateEmbeddedGlobalAccessString(String global) {
@@ skipping 91 matching lines @@
     // tokens in the main-fragment.
     deferredHashTokens.forEach((DeferredFragment key,
                                 _DeferredFragmentHash token) {
       token.setHash(hunkHashes[key]);
     });
 
     writeMainFragment(mainFragment, mainCode);
 
     if (backend.requiresPreamble &&
         !backend.htmlLibraryIsLoaded) {
-      compiler.reportHintMessage(
+      reporter.reportHintMessage(
           NO_LOCATION_SPANNABLE, MessageKind.PREAMBLE);
     }
 
     if (compiler.deferredMapUri != null) {
       writeDeferredMap();
     }
 
     // Return the total program size.
     return outputBuffers.values.fold(0, (a, b) => a + b.length);
   }
@@ skipping 177 matching lines @@
     // Json does not support comments, so we embed the explanation in the
     // data.
     mapping["_comment"] = "This mapping shows which compiled `.js` files are "
         "needed for a given deferred library import.";
     mapping.addAll(compiler.deferredLoadTask.computeDeferredMap());
     compiler.outputProvider(compiler.deferredMapUri.path, 'deferred_map')
       ..add(const JsonEncoder.withIndent("  ").convert(mapping))
       ..close();
   }
 }