Switch FE to use the libraries.json format.

pkg/front_end/test/fasta/testing/suite.dart

Index: pkg/front_end/test/fasta/testing/suite.dart
diff --git a/pkg/front_end/test/fasta/testing/suite.dart b/pkg/front_end/test/fasta/testing/suite.dart
index bde552d310d394cd078e943e7a5ee4c56911dea8..4cdc6756c732e8337cb74b34add2fa8883d266f1 100644
--- a/pkg/front_end/test/fasta/testing/suite.dart
+++ b/pkg/front_end/test/fasta/testing/suite.dart
@@ -12,6 +12,9 @@ import 'dart:convert' show JSON;
 
 import 'package:front_end/physical_file_system.dart' show PhysicalFileSystem;
 
+import 'package:front_end/src/base/libraries_specification.dart'
+    show TargetLibrariesSpecification;
+
 import 'package:front_end/src/fasta/testing/validating_instrumentation.dart'
     show ValidatingInstrumentation;
 
@@ -155,8 +158,10 @@ class FastaContext extends ChainContext {
     Uri sdk = await computePatchedSdk();
     Uri vm = computeDartVm(sdk);
     Uri packages = Uri.base.resolve(".packages");
-    UriTranslator uriTranslator = await UriTranslatorImpl
-        .parse(PhysicalFileSystem.instance, sdk, packages: packages);
+    var options = new ProcessedOptions(new CompilerOptions()
+      ..sdkRoot = sdk
+      ..packagesFileUri = packages);
+    UriTranslator uriTranslator = await options.getUriTranslator();
     bool strongMode = environment.containsKey(STRONG_MODE);
     bool updateExpectations = environment["updateExpectations"] == "true";
     bool updateComments = environment["updateComments"] == "true";
@@ -242,8 +247,7 @@ class Outline extends Step<TestDescription, Program, FastaContext> {
       // We create a new URI translator to avoid reading platform libraries from
       // file system.
       UriTranslatorImpl uriTranslator = new UriTranslatorImpl(
-          const <String, Uri>{},
-          const <String, List<Uri>>{},
+          const TargetLibrariesSpecification('vm'),
           context.uriTranslator.packages);
       KernelTarget sourceTarget = astKind == AstKind.Analyzer
           ? new AnalyzerTarget(dillTarget, uriTranslator, strongMode)