Adding Angular and dependent packages for testing

third_party/pkg/angular/perf/lexer_perf.dart

+library lexer_perf;
+
+import '_perf.dart';
+import 'package:angular/core/parser/parser_library.dart';
+
+main() {
+  Lexer lexer = new Lexer();
+  time('ident', () =>
+      lexer.call('ctrl foo baz ctrl.foo ctrl.bar ctrl.baz'));
+  time('ident-path', () =>
+      lexer.call('a.b a.b.c a.b.c.d a.b.c.d.e.f'));
+  time('num', () =>
+      lexer.call('1 23 34 456 12341234 12351235'));
+  time('num-double', () =>
+      lexer.call('.0 .1 .12 0.123 0.1234'));
+  time('string', () =>
+      lexer.call("'quick brown dog and fox say what'"));
+  time('string-escapes', () =>
+      lexer.call("quick '\\' brown \u1234 dog and fox\n\rsay what'"));
+}