Support VTune's JIT interface.

runtime/vm/vtune.h

+// Copyright (c) 2012, 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.
+
+#ifndef VM_VTUNE_H_
+#define VM_VTUNE_H_
+
+#include "vm/dart.h"
+
+namespace dart {
+
+class VTuneCodeObserver : public CodeObserver {

[Ivan Posva, 2012/11/27 09:11:20]

Do not even define this if DART_VTUNE_SUPPORT is not enabled?

[Vyacheslav Egorov (Google), 2012/11/27 16:26:12]

Done.

+ public:
+  virtual bool IsActive() const;
+
+  virtual void Notify(const char* name,
+                      uword base,
+                      uword prologue_offset,
+                      uword size,
+                      bool optimized);
+};
+
+
+}  // namespace dart
+
+#endif  // VM_VTUNE_H_