Converted Observatory cpu-profile element

runtime/observatory/lib/src/models/repositories/sample_profile.dart

+// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file
+
+part of models;
+
+enum SampleProfileTag {
+  userVM,
+  userOnly,
+  vmUser,
+  vmOnly,
+  none
+}
+
+enum SampleProfileLoadingStatus {
+  disabled,
+  fetching,
+  loading,
+  loaded
+}
+
+bool isSampleProcessRunning(SampleProfileLoadingStatus status) {
+  switch (status) {
+    case SampleProfileLoadingStatus.fetching:
+    case SampleProfileLoadingStatus.loading:
+      return true;
+    default:
+      return false;
+  }
+}
+
+abstract class SampleProfileLoadingProgressEvent {
+  SampleProfileLoadingProgress get progress;
+}
+
+abstract class SampleProfileLoadingProgress {
+  SampleProfileLoadingStatus get status;
+  double get progress;
+  Duration get fetchingTime;
+  Duration get loadingTime;
+  SampleProfile get profile;
+}
+
+abstract class ClassSampleProfileRepository {
+  Stream<SampleProfileLoadingProgressEvent> get(ClassRef cls,
+      SampleProfileTag tag, {bool clear: false});
+}
+
+abstract class IsolateSampleProfileRepository {
+  Stream<SampleProfileLoadingProgressEvent> get(IsolateRef cls,
+      SampleProfileTag tag, {bool clear: false, bool forceFetch: false});
+}