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diff --git a/third_party/content_analysis_sdk/agent/src/event_win.h b/third_party/content_analysis_sdk/agent/src/event_win.h
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+// Copyright 2022 The Chromium Authors.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_ANALYSIS_AGENT_SRC_EVENT_WIN_H_
+#define CONTENT_ANALYSIS_AGENT_SRC_EVENT_WIN_H_
+
+#include <windows.h>
+
+#include "event_base.h"
+
+namespace content_analysis {
+namespace sdk {
+
+// ContentAnalysisEvent implementaton for Windows.
+class ContentAnalysisEventWin : public ContentAnalysisEventBase {
+ public:
+ ContentAnalysisEventWin(HANDLE handle,
+ const BrowserInfo& browser_info,
+ ContentAnalysisRequest request);
+ ~ContentAnalysisEventWin() override;
+
+ // Initialize the event. This involves reading the request from Google
+ // Chrome and making sure it is well formed.
+ ResultCode Init();
+
+ // ContentAnalysisEvent:
+ ResultCode Close() override;
+ ResultCode Send() override;
+ std::string DebugString() const override;
+ std::string SerializeStringToSendToBrowser() {
+ return agent_to_chrome()->SerializeAsString();
+ }
+ void SetResponseSent() { response_sent_ = true; }
+
+ HANDLE Pipe() const { return hPipe_; }
+
+ private:
+ void Shutdown();
+
+ // This handle is not owned by the event.
+ HANDLE hPipe_ = INVALID_HANDLE_VALUE;
+
+ // Set to true when Send() is called the first time.
+ bool response_sent_ = false;
+};
+
+} // namespace sdk
+} // namespace content_analysis
+
+#endif // CONTENT_ANALYSIS_AGENT_SRC_EVENT_WIN_H_ \ No newline at end of file