Implement tracing interface for v8

src/tracing/trace-event.cc

+// Copyright 2015 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.
+
+#include "src/tracing/trace-event.h"
+
+#include "src/v8.h"
+
+namespace v8 {
+namespace internal {
+namespace tracing {
+
+v8::Platform* TraceEventHelper::GetCurrentPlatform() {
+  return v8::internal::V8::GetCurrentPlatform();
+}
+
+}  // namespace tracing
+}  // namespace internal
+}  // namespace v8