Revert "Use native async/await support in pub."

sdk/lib/_internal/pub_generated/test/dependency_computer/utils.dart

Index: sdk/lib/_internal/pub_generated/test/dependency_computer/utils.dart
diff --git a/sdk/lib/_internal/pub/test/dependency_computer/utils.dart b/sdk/lib/_internal/pub_generated/test/dependency_computer/utils.dart
similarity index 90%
copy from sdk/lib/_internal/pub/test/dependency_computer/utils.dart
copy to sdk/lib/_internal/pub_generated/test/dependency_computer/utils.dart
index 87ce96929075a7dad7a3dde98912de7fc8221761..33b1bf76431903a5d513c7ee192d423520a6a622 100644
--- a/sdk/lib/_internal/pub/test/dependency_computer/utils.dart
+++ b/sdk/lib/_internal/pub_generated/test/dependency_computer/utils.dart
@@ -66,8 +66,8 @@ void expectLibraryDependencies(String id, Iterable<String> expected) {
 
   schedule(() {
     var computer = new DependencyComputer(_loadPackageGraph());
-    var result = computer.transformersNeededByLibrary(new AssetId.parse(id))
-        .map((id) => id.toString()).toSet();
+    var result = computer.transformersNeededByLibrary(
+        new AssetId.parse(id)).map((id) => id.toString()).toSet();
     expect(result, equals(expected));
   }, "expect dependencies to match $expected");
 }
@@ -89,14 +89,14 @@ PackageGraph _loadPackageGraph() {
   for (var package in listDir(sandboxDir)) {
     if (!fileExists(p.join(package, 'pubspec.yaml'))) continue;
     var packageName = p.basename(package);
-    packages[packageName] = new Package.load(
-        packageName, package, systemCache.sources);
+    packages[packageName] =
+        new Package.load(packageName, package, systemCache.sources);
   }
 
   loadPackage(packageName) {
     if (packages.containsKey(packageName)) return;
-    packages[packageName] = new Package.load(
-        packageName, packagePath(packageName), systemCache.sources);
+    packages[packageName] =
+        new Package.load(packageName, packagePath(packageName), systemCache.sources);
     for (var dep in packages[packageName].dependencies) {
       loadPackage(dep.name);
     }
@@ -112,8 +112,8 @@ PackageGraph _loadPackageGraph() {
 String transformer([Iterable<String> imports]) {
   if (imports == null) imports = [];
 
-  var buffer = new StringBuffer()
-      ..writeln('import "package:barback/barback.dart";');
+  var buffer =
+      new StringBuffer()..writeln('import "package:barback/barback.dart";');
   for (var import in imports) {
     buffer.writeln('import "$import";');
   }