Experimentally isolate GetOpenFileName in a utility process.

chrome/utility/shell_handler_win.cc

+// Copyright (c) 2014 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.
+
+#include "chrome/utility/shell_handler_win.h"
+
+#include <commdlg.h>
+
+#include "base/files/file_path.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/common/chrome_utility_messages.h"
+#include "content/public/utility/utility_thread.h"
+#include "ui/base/win/open_file_name_win.h"
+
+ShellHandler::ShellHandler() {}
+ShellHandler::~ShellHandler() {}
+
+bool ShellHandler::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(ShellHandler, message)
+    IPC_MESSAGE_HANDLER(ChromeUtilityMsg_GetOpenFileName,
+                        OnGetOpenFileName)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void ShellHandler::OnGetOpenFileName(
+    HWND owner,
+    DWORD flags,
+    const GetOpenFileNameFilter& filter,
+    const base::FilePath& initial_directory,
+    const base::FilePath& filename) {
+  ui::win::OpenFileName open_file_name(owner, flags);
+  open_file_name.SetInitialSelection(initial_directory, filename);
+  open_file_name.SetFilters(filter);
+
+  base::FilePath directory;
+  std::vector<base::FilePath> filenames;
+
+  if (::GetOpenFileName(open_file_name.GetOPENFILENAME()))
+    open_file_name.GetResult(&directory, &filenames);
+
+  if (filenames.size()) {
+    content::UtilityThread::Get()->Send(
+        new ChromeUtilityHostMsg_GetOpenFileName_Result(directory, filenames));
+  } else {
+    content::UtilityThread::Get()->Send(
+        new ChromeUtilityHostMsg_GetOpenFileName_Failed());
+  }
+}