Update pubspecs and dependencies to get pkgbuild tests working.

third_party/pkg/angular/lib/tools/io_impl.dart

Index: third_party/pkg/angular/lib/tools/io_impl.dart
diff --git a/third_party/pkg/angular/lib/tools/io_impl.dart b/third_party/pkg/angular/lib/tools/io_impl.dart
deleted file mode 100644
index 9cbf134d813e91dc2bb67b52b0bf95a3587b80d7..0000000000000000000000000000000000000000
--- a/third_party/pkg/angular/lib/tools/io_impl.dart
+++ /dev/null
@@ -1,22 +0,0 @@
-library angular.io_impl;
-
-import 'dart:io';
-import 'package:angular/tools/io.dart';
-
-class IoServiceImpl implements IoService {
-
-  String readAsStringSync(String filePath) =>
-      new File(filePath).readAsStringSync();
-
-  void visitFs(String rootDir, FsVisitor visitor) {
-    Directory root = new Directory(rootDir);
-    if (!FileSystemEntity.isDirectorySync(rootDir)) {
-      throw 'Expected $rootDir to be a directory!';
-    }
-    root.listSync(recursive: true, followLinks: true).forEach((entity) {
-      if (entity.statSync().type == FileSystemEntityType.FILE) {
-        visitor(entity.path);
-      }
-    });
-  }
-}