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diff --git a/src/3rdparty/v8/src/vm-state.h b/src/3rdparty/v8/src/vm-state.h
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+// Copyright 2010 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef V8_VM_STATE_H_
+#define V8_VM_STATE_H_
+
+#include "isolate.h"
+
+namespace v8 {
+namespace internal {
+
+class VMState BASE_EMBEDDED {
+#ifdef ENABLE_VMSTATE_TRACKING
+ public:
+  inline VMState(Isolate* isolate, StateTag tag);
+  inline ~VMState();
+
+ private:
+  Isolate* isolate_;
+  StateTag previous_tag_;
+
+#else
+ public:
+  VMState(Isolate* isolate, StateTag state) {}
+#endif
+};
+
+
+class ExternalCallbackScope BASE_EMBEDDED {
+#ifdef ENABLE_LOGGING_AND_PROFILING
+ public:
+  inline ExternalCallbackScope(Isolate* isolate, Address callback);
+  inline ~ExternalCallbackScope();
+ private:
+  Isolate* isolate_;
+  Address previous_callback_;
+#else
+ public:
+  ExternalCallbackScope(Isolate* isolate, Address callback) {}
+#endif
+};
+
+} }  // namespace v8::internal
+
+
+#endif  // V8_VM_STATE_H_