[inspector] change implementation file extension from cpp to cc

src/inspector/V8SchemaAgentImpl.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_V8SCHEMAAGENTIMPL_H_
-#define V8_INSPECTOR_V8SCHEMAAGENTIMPL_H_
-
-#include "src/base/macros.h"
-#include "src/inspector/protocol/Forward.h"
-#include "src/inspector/protocol/Schema.h"
-
-namespace v8_inspector {
-
-class V8InspectorSessionImpl;
-
-using protocol::ErrorString;
-
-class V8SchemaAgentImpl : public protocol::Schema::Backend {
-  DISALLOW_COPY_AND_ASSIGN(V8SchemaAgentImpl);
-
- public:
-  V8SchemaAgentImpl(V8InspectorSessionImpl*, protocol::FrontendChannel*,
-                    protocol::DictionaryValue* state);
-  ~V8SchemaAgentImpl() override;
-
-  void getDomains(
-      ErrorString*,
-      std::unique_ptr<protocol::Array<protocol::Schema::Domain>>*) override;
-
- private:
-  V8InspectorSessionImpl* m_session;
-  protocol::Schema::Frontend m_frontend;
-};
-
-}  // namespace v8_inspector
-
-#endif  // V8_INSPECTOR_V8SCHEMAAGENTIMPL_H_