[Downloads] Move client guid for AV scanning of downloaded files to chrome/

chrome/browser/media_galleries/fileapi/scanning_file_validator.h

+// Copyright 2013 The Chromium 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 CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SCANNING_FILE_VALIDATOR_H_
+#define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SCANNING_FILE_VALIDATOR_H_
+
+#include "base/basictypes.h"
+#include "base/files/file_path.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "webkit/browser/fileapi/copy_or_move_file_validator.h"
+
+namespace chrome {
+
+// This class supports AV scanning on post write validation.
+class ScanningFileValidator : public fileapi::CopyOrMoveFileValidator {
+ public:
+  virtual ~ScanningFileValidator();
+
+  // This method will forward to OnFileOpen after the file has been read.
+  virtual void StartPreWriteValidation(
+      const ResultCallback& result_callback) OVERRIDE;
+
+  // Runs AV checks on the resulting file (Windows-only).
+  // Subclasses will not typically override this method.
+  virtual void StartPostWriteValidation(
+      const base::FilePath& dest_platform_path,
+      const ResultCallback& result_callback) OVERRIDE;
+
+ protected:
+  explicit ScanningFileValidator(const base::FilePath& file);
+
+  // Subclasses should do whatever validation they need to on the file
+  // here. When done, they may use |callback_| to schedule the
+  // validation reply. Default validation behavior is "can data be read."
+  virtual void OnFileOpen(scoped_ptr<std::string> data);
+
+  base::FilePath path_;
+  fileapi::CopyOrMoveFileValidator::ResultCallback callback_;
+  base::WeakPtrFactory<SupportedImageTypeValidator> weak_factory_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ScanningFileValidator);
+};
+
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_SCANNING_FILE_VALIDATOR_H_