Read SDK and patches from a JSON file.

pkg/front_end/lib/src/fasta/compile_platform.dart

 // Copyright (c) 2016, 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 fasta.compile_platform;
 
 import 'dart:async' show Future;
 
 import 'dart:io' show exitCode;
 
@@ skipping 49 matching lines @@
     print("Note: strong mode support is preliminary and may not work.");
   }
   ticker.isVerbose = c.options.verbose;
   Uri deps = Uri.base.resolveUri(new Uri.file("${fullOutput.toFilePath()}.d"));
   ticker.logMs("Parsed arguments");
   if (ticker.isVerbose) {
     print("Generating outline of $patchedSdk into $outlineOutput");
     print("Compiling $patchedSdk to $fullOutput");
   }
 
-  TranslateUri uriTranslator =
-      await TranslateUri.parse(c.fileSystem, patchedSdk, c.options.packages);
+  TranslateUri uriTranslator = await TranslateUri
+      .parse(c.fileSystem, patchedSdk, packages: c.options.packages);
   ticker.logMs("Read packages file");
 
   DillTarget dillTarget =
       new DillTarget(ticker, uriTranslator, c.options.target);
   KernelTarget kernelTarget = new KernelTarget(c.fileSystem, dillTarget,
       uriTranslator, c.options.strongMode, c.uriToSource);
 
   kernelTarget.read(Uri.parse("dart:core"));
   await dillTarget.buildOutlines();
   var outline = await kernelTarget.buildOutlines();
 
   await writeProgramToFile(outline, outlineOutput);
   ticker.logMs("Wrote outline to ${outlineOutput.toFilePath()}");
 
   if (exitCode != 0) return null;
 
   var program = await kernelTarget.buildProgram(verify: c.options.verify);
   if (c.options.dumpIr) printProgramText(program);
   await writeProgramToFile(program, fullOutput);
   ticker.logMs("Wrote program to ${fullOutput.toFilePath()}");
   await kernelTarget.writeDepsFile(fullOutput, deps);
 }