Move setup of code event handlers to gin

gin/debug_impl.h

+// Copyright 2014 The Chromium 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 GIN_PUBLIC_DEBUG_IMPL_H_
+#define GIN_PUBLIC_DEBUG_IMPL_H_
+
+#include "gin/public/debug.h"
+#include "v8/include/v8.h"
+
+namespace gin {
+
+class DebugImpl {
+ public:
+  static v8::FunctionEntryHook GetFunctionEntryHook();
+  static v8::JitCodeEventHandler GetJitCodeEventHandler();
+};
+
+}  // namespace gin
+
+#endif  // GIN_PUBLIC_DEBUG_IMPL_H_