Converted Observatory class-view element

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

Index: runtime/observatory/lib/src/repositories/sample_profile.dart
diff --git a/runtime/observatory/lib/src/repositories/sample_profile.dart b/runtime/observatory/lib/src/repositories/sample_profile.dart
index 57521398484f5c402bb1069d60c19a0d750056b5..0cf5b55e942e736f3080c5338233fa271afe3eeb 100644
--- a/runtime/observatory/lib/src/repositories/sample_profile.dart
+++ b/runtime/observatory/lib/src/repositories/sample_profile.dart
@@ -127,11 +127,25 @@ class IsolateSampleProfileRepository
 
 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 cls.setTraceAllocations(true);
+  }
+
+  Future disable(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(false);
   }
 }