[inspector] Initial import of v8_inspector.

src/inspector/V8Compat.h

+// Copyright 2016 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_INSPECTOR_V8COMPAT_H_
+#define V8_INSPECTOR_V8COMPAT_H_
+
+#include <v8.h>
+
+#if V8_MAJOR_VERSION < 5 || (V8_MAJOR_VERSION == 5 && V8_MINOR_VERSION < 1)
+namespace v8 {
+
+// In standalone V8 inspector this is expected to be noop anyways...
+class V8_EXPORT MicrotasksScope {
+ public:
+  enum Type { kRunMicrotasks, kDoNotRunMicrotasks };
+
+  MicrotasksScope(Isolate* isolate, Type type) {
+    // No-op
+  }
+};
+
+}  // namespace v8
+#define V8_FUNCTION_NEW_REMOVE_PROTOTYPE(context, callback, data, length) \
+  v8::Function::New((context), (callback), (data), (length))
+#else
+#define V8_FUNCTION_NEW_REMOVE_PROTOTYPE(context, callback, data, length) \
+  v8::Function::New((context), (callback), (data), (length),              \
+                    v8::ConstructorBehavior::kThrow)
+#endif  // V8_MAJOR_VERSION < 5 || (V8_MAJOR_VERSION == 5 && V8_MINOR_VERSION <
+        // 1)
+
+#endif  // V8_INSPECTOR_V8COMPAT_H_