Read SDK and patches from a JSON file.

pkg/front_end/test/fasta/shaker_test.dart

 // Copyright (c) 2017, 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.md file.
 
 /// Tests basic functionality of the API tree-shaker.
 ///
 /// Each input file is built and tree-shaken, then we check that the set of
 /// libraries, classes, and members that are retained match those declared in an
 /// expectations file.
 ///
@@ skipping 57 matching lines @@
     return loadProgramFromBytes(outlineBytes);
   }
 
   static create(Map<String, String> environment) async {
     environment[ENABLE_FULL_COMPILE] = "";
     environment[AST_KIND_INDEX] = "${AstKind.Kernel.index}";
     bool updateExpectations = environment["updateExpectations"] == "true";
     Uri sdk = await computePatchedSdk();
     Uri outlineUri = sdk.resolve('outline.dill');
     Uri packages = Uri.base.resolve(".packages");
-    TranslateUri uriTranslator =
-        await TranslateUri.parse(PhysicalFileSystem.instance, packages);
+    TranslateUri uriTranslator = await TranslateUri
+        .parse(PhysicalFileSystem.instance, sdk, packages: packages);
     List<int> outlineBytes = new File.fromUri(outlineUri).readAsBytesSync();
     return new TreeShakerContext(
         outlineUri, uriTranslator, outlineBytes, updateExpectations);
   }
 }
 
 /// Step that extracts the test-specific options and builds the program without
 /// applying tree-shaking.
 class BuildProgram
     extends Step<TestDescription, _IntermediateData, TreeShakerContext> {
@@ skipping 142 matching lines @@
           """
 Please create file ${expectedFile.path} with this content:
 $buffer""");
     }
   }
 }
 
 /// A special library used only to test the shaker. The suite above will
 /// tree-shake the contents of this library.
 const _specialLibraryPath = 'pkg/front_end/testcases/shaker/lib/lib.dart';