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diff --git a/deps/v8/src/execution/runtime-profiler.h b/deps/v8/src/execution/runtime-profiler.h
new file mode 100644
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+++ b/deps/v8/src/execution/runtime-profiler.h
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+// Copyright 2012 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_EXECUTION_RUNTIME_PROFILER_H_
+#define V8_EXECUTION_RUNTIME_PROFILER_H_
+
+#include "src/utils/allocation.h"
+
+namespace v8 {
+namespace internal {
+
+class BytecodeArray;
+class Isolate;
+class InterpretedFrame;
+class JSFunction;
+enum class OptimizationReason : uint8_t;
+
+class RuntimeProfiler {
+ public:
+  explicit RuntimeProfiler(Isolate* isolate);
+
+  void MarkCandidatesForOptimization();
+
+  void NotifyICChanged() { any_ic_changed_ = true; }
+
+  void AttemptOnStackReplacement(InterpretedFrame* frame,
+                                 int nesting_levels = 1);
+
+ private:
+  void MaybeOptimize(JSFunction function, InterpretedFrame* frame);
+  // Potentially attempts OSR from and returns whether no other
+  // optimization attempts should be made.
+  bool MaybeOSR(JSFunction function, InterpretedFrame* frame);
+  OptimizationReason ShouldOptimize(JSFunction function,
+                                    BytecodeArray bytecode_array);
+  void Optimize(JSFunction function, OptimizationReason reason);
+  void Baseline(JSFunction function, OptimizationReason reason);
+
+  Isolate* isolate_;
+  bool any_ic_changed_;
+};
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_EXECUTION_RUNTIME_PROFILER_H_