[inspector] Build inspector under v8_enable_inspector build flag.

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_