[inspector] change implementation file extension from cpp to cc

src/inspector/V8InternalValueType.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_V8INTERNALVALUETYPE_H_
-#define V8_INSPECTOR_V8INTERNALVALUETYPE_H_
-
-#include "include/v8.h"
-
-namespace v8_inspector {
-
-enum class V8InternalValueType { kEntry, kLocation, kScope, kScopeList };
-
-bool markAsInternal(v8::Local<v8::Context>, v8::Local<v8::Object>,
-                    V8InternalValueType);
-bool markArrayEntriesAsInternal(v8::Local<v8::Context>, v8::Local<v8::Array>,
-                                V8InternalValueType);
-v8::Local<v8::Value> v8InternalValueTypeFrom(v8::Local<v8::Context>,
-                                             v8::Local<v8::Object>);
-
-}  // namespace v8_inspector
-
-#endif  // V8_INSPECTOR_V8INTERNALVALUETYPE_H_