components/js_injection/browser/web_message_host.h

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_JS_INJECTION_BROWSER_WEB_MESSAGE_HOST_H_
#define COMPONENTS_JS_INJECTION_BROWSER_WEB_MESSAGE_HOST_H_

#include <memory>

namespace js_injection {

struct WebMessage;

// Represents the browser side of a WebMessage channel.
class WebMessageHost {
 public:
  virtual ~WebMessageHost() = default;

  virtual void OnPostMessage(std::unique_ptr<WebMessage> message) = 0;

  // Called when the value of associated RenderFrameHost's
  // IsInBackForwardCache() changes.
  virtual void OnBackForwardCacheStateChanged() {}
};

}  // namespace js_injection

#endif  // COMPONENTS_JS_INJECTION_BROWSER_WEB_MESSAGE_HOST_H_