Revert "Store library paths relative to a given application root folder."

pkg/kernel/bin/dartk.dart

Index: pkg/kernel/bin/dartk.dart
diff --git a/pkg/kernel/bin/dartk.dart b/pkg/kernel/bin/dartk.dart
index 9d4f6da7ee1f7d759a46426cd70c8195d66dd8fc..e735f9789e5a18560c3dd1c4cca2a6f8b418486a 100755
--- a/pkg/kernel/bin/dartk.dart
+++ b/pkg/kernel/bin/dartk.dart
@@ -10,7 +10,6 @@ import 'batch_util.dart';
 
 import 'package:args/args.dart';
 import 'package:kernel/analyzer/loader.dart';
-import 'package:kernel/application_root.dart';
 import 'package:kernel/verifier.dart';
 import 'package:kernel/kernel.dart';
 import 'package:kernel/log.dart';
@@ -37,9 +36,6 @@ ArgParser parser = new ArgParser(allowTrailingOptions: true)
   ..addOption('packages',
       abbr: 'p', help: 'Path to the .packages file or packages folder.')
   ..addOption('package-root', help: 'Deprecated alias for --packages')
-  ..addOption('app-root',
-      help: 'Store library paths relative to the given directory.\n'
-          'Defaults to the working directory')
   ..addOption('target',
       abbr: 't',
       help: 'Tailor the IR to the given target.',
@@ -248,12 +244,6 @@ Future<CompilerOutcome> batchMain(
   String packagePath = options['packages'] ?? options['package-root'];
   checkIsFileOrDirectoryOrNull(packagePath, 'Package root or .packages');
 
-  String applicationRootOption = options['app-root'];
-  checkIsDirectoryOrNull(applicationRootOption, 'Application root');
-  applicationRootOption ??= Directory.current.path;
-  applicationRootOption = new File(applicationRootOption).absolute.path;
-  var applicationRoot = new ApplicationRoot(applicationRootOption);
-
   // Set up logging.
   if (options['verbose']) {
     log.onRecord.listen((LogRecord rec) {
@@ -307,8 +297,7 @@ Future<CompilerOutcome> batchMain(
         sdk: options['sdk'],
         packagePath: packagePath,
         customUriMappings: customUriMappings,
-        declaredVariables: declaredVariables,
-        applicationRoot: applicationRoot);
+        declaredVariables: declaredVariables);
     String packageDiscoveryPath = batchModeState.isBatchMode ? null : file;
     DartLoader loader = await batchModeState.batch.getLoader(
         repository, dartOptions,
@@ -317,8 +306,7 @@ Future<CompilerOutcome> batchMain(
       program = loader.loadProgram(file, target: target);
     } else {
       var library = loader.loadLibrary(file);
-      assert(library ==
-          repository.getLibraryReference(applicationRoot.resolve(file)));
+      assert(library == repository.getLibrary(file));
       program = new Program(repository.libraries);
     }
     errors = loader.errors;