Adding Angular and dependent packages for testing

third_party/pkg/perf_api/lib/console_impl.dart

+library perf_api.console_impl;
+
+import 'dart:html' as dom;
+import 'dart:collection';
+import 'perf_api.dart';
+
+/**
+ * Simple window.console based implementation.
+ */
+class ConsoleProfiler extends Profiler {
+  int _timerIds = 0;
+  Map<int, String> _timers = new Map<int, String>();
+  Map<int, String> _timerNames = new LinkedHashMap<int, String>();
+  final dom.Window window;
+
+  ConsoleProfiler() :this.window = dom.window;
+
+  ConsoleProfiler.forWindow(this.window);
+
+  dynamic startTimer(String name, [dynamic extraData]) {
+    var timerId = _timerIds++;
+    _timers[timerId] = _timerName(name, extraData);
+    _timerNames[timerId] = name;
+    window.console.time(_timerStr(timerId, _timers[timerId]));
+    return timerId;
+  }
+
+  String _timerName(String name, dynamic extraData) =>
+      '$name${_stringifyExtraData(extraData)}';
+
+  String _stringifyExtraData(extraData) =>
+      (extraData == null || extraData is! String) ? '' : ' $extraData';
+
+  String _timerStr(id, name) => '${name} ($id)';
+
+  void stopTimer(dynamic idOrName) {
+    int timerId;
+    if (idOrName is int) {
+      timerId = idOrName;
+    } else {
+      // TODO: change this to use a multimap.
+      for (var id in _timerNames.keys) {
+        if (_timerNames[id] == idOrName) {
+          timerId = id;
+          break;
+        }
+      }
+    }
+    if (timerId == null) {
+      throw new ProfilerError('Unable for find timer for $idOrName');
+    }
+    window.console.timeEnd(_timerStr(timerId, _timers[timerId]));
+    _timerNames.remove(timerId);
+    _timers.remove(timerId);
+  }
+
+  void markTime(String name, [dynamic extraData]) {
+    window.console.timeStamp(_timerName(name, extraData));
+  }
+}