Converted Observatory class-view element

runtime/observatory/lib/src/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 repositories;
 
 String _tagToString(M.SampleProfileTag tag) {
   switch (tag) {
     case M.SampleProfileTag.userVM: return 'UserVM';
     case M.SampleProfileTag.userOnly: return 'UserOnly';
@@ skipping 109 matching lines @@
       _last.reuse();
     } else {
       _last = new SampleProfileLoadingProgress(isolate, t, clear);
     }
     return _last.onProgress;
   }
 }
 
 class ClassSampleProfileRepository
     implements M.ClassSampleProfileRepository {
-  Stream<SampleProfileLoadingProgressEvent> get(M.ClassRef c,
-      M.SampleProfileTag t, {bool clear: false}) {
+  Stream<SampleProfileLoadingProgressEvent> get(M.Isolate i, M.ClassRef c,
+      M.SampleProfileTag t) {
+    S.Isolate isolate = i as S.Isolate;
+    S.Class cls = c as S.Class;
+    assert(isolate != null);
+    assert(cls != null);
+    return new SampleProfileLoadingProgress(isolate, t,
+        false, cls: cls).onProgress;
+  }
+
+  Future enable(M.IsolateRef i, M.ClassRef c) {
     S.Class cls = c as S.Class;
     assert(cls != null);
-    return new SampleProfileLoadingProgress(cls.isolate, t,
-        clear, cls: cls).onProgress;
+    return cls.setTraceAllocations(true);
+  }
+
+  Future disable(M.IsolateRef i, M.ClassRef c) {
+    S.Class cls = c as S.Class;
+    assert(cls != null);
+    return cls.setTraceAllocations(false);
   }
 }