Remove use of Compiler in inferrer engines.

pkg/compiler/lib/src/dump_info.dart

Index: pkg/compiler/lib/src/dump_info.dart
diff --git a/pkg/compiler/lib/src/dump_info.dart b/pkg/compiler/lib/src/dump_info.dart
index cc292e4c55b0af777267c083f3248985a609e0ed..591459b128330b019460229ba155665859ad14bc 100644
--- a/pkg/compiler/lib/src/dump_info.dart
+++ b/pkg/compiler/lib/src/dump_info.dart
@@ -543,8 +543,10 @@ class DumpInfoTask extends CompilerTask implements InfoReporter {
       infoCollector = new ElementInfoCollector(compiler, closedWorld)..run();
       StringBuffer jsonBuffer = new StringBuffer();
       dumpInfoJson(jsonBuffer, closedWorld);
-      compiler.outputProvider(compiler.options.outputUri.pathSegments.last,
-          'info.json', OutputType.info)
+      compiler.outputProvider.createOutputSink(
+          compiler.options.outputUri.pathSegments.last,
+          'info.json',
+          OutputType.info)
         ..add(jsonBuffer.toString())
         ..close();
     });