Remove Compiler access from ResolutionEnqueuer

pkg/compiler/lib/src/dump_info.dart

 // Copyright (c) 2013, 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 dump_info;
 
 import 'dart:convert'
     show ChunkedConversionSink, JsonEncoder, StringConversionSink;
 
 import 'package:dart2js_info/info.dart';
@@ skipping 403 matching lines @@
 
   void reportInlined(Element element, Element inlinedFrom) {
     inlineCount.putIfAbsent(element, () => 0);
     inlineCount[element] += 1;
     inlineMap.putIfAbsent(inlinedFrom, () => new List<Element>());
     inlineMap[inlinedFrom].add(element);
   }
 
   final Map<Element, Set<Element>> _dependencies = {};
   void registerDependency(Element source, Element target) {
-    _dependencies.putIfAbsent(source, () => new Set()).add(target);
+    if (compiler.options.dumpInfo) {
+      _dependencies.putIfAbsent(source, () => new Set()).add(target);
+    }
   }
 
   void registerImpact(Element element, WorldImpact impact) {
     if (compiler.options.dumpInfo) {
       impacts[element] = impact;
     }
   }
 
   void unregisterImpact(Element element) {
     impacts.remove(element);
@@ skipping 162 matching lines @@
 
     ChunkedConversionSink<Object> sink = encoder.startChunkedConversion(
         new StringConversionSink.fromStringSink(buffer));
     sink.add(new AllInfoJsonCodec().encode(result));
     compiler.reporter.reportInfo(NO_LOCATION_SPANNABLE, MessageKind.GENERIC, {
       'text': "View the dumped .info.json file at "
           "https://dart-lang.github.io/dump-info-visualizer"
     });
   }
 }