Adding Angular and dependent packages for testing

third_party/pkg/angular/lib/core/parser/parser_library.dart

Index: third_party/pkg/angular/lib/core/parser/parser_library.dart
diff --git a/third_party/pkg/angular/lib/core/parser/parser_library.dart b/third_party/pkg/angular/lib/core/parser/parser_library.dart
new file mode 100644
index 0000000000000000000000000000000000000000..dedce6fd63335128cbfc7293787f60260bd1074e
--- /dev/null
+++ b/third_party/pkg/angular/lib/core/parser/parser_library.dart
@@ -0,0 +1,19 @@
+library angular.core.parser;
+
+import 'dart:mirrors';
+
+import 'package:angular/utils.dart';
+import 'package:angular/core/module.dart';
+import 'package:angular/core/parser/characters.dart';
+
+part 'backend.dart';
+part 'lexer.dart';
+part 'parser.dart';
+part 'static_parser.dart';
+
+// Placeholder for DI.
+// The parser you are looking for is DynamicParser
+abstract class Parser {
+  Expression call(String text) {}
+  primaryFromToken(Token token, parserError);
+}