feat: implement File System API support (#41419)

shell/common/api/electron_api_clipboard.h

@@ -8,6 +8,7 @@
 #include <string>
 #include <vector>
 
+#include "shell/common/gin_converters/file_path_converter.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/gfx/image/image.h"
 #include "v8/include/v8.h"
@@ -63,6 +64,8 @@ class Clipboard {
   static void WriteBuffer(const std::string& format_string,
                           const v8::Local<v8::Value> buffer,
                           gin_helper::Arguments* args);
+
+  static void WriteFilesForTesting(const std::vector<base::FilePath>& files);
 };
 
 }  // namespace electron::api