Disable drive scan on startup to avoid spinning floppy drives

chrome/browser/storage_monitor/volume_mount_watcher_win.h

 // Copyright (c) 2012 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_STORAGE_MONITOR_VOLUME_MOUNT_WATCHER_WIN_H_
 #define CHROME_BROWSER_STORAGE_MONITOR_VOLUME_MOUNT_WATCHER_WIN_H_
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/memory/weak_ptr.h"
+#include "base/sequenced_task_runner.h"
 #include "base/string16.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/storage_monitor/storage_monitor.h"
 
 namespace chrome {
 
 // This class watches the volume mount points and sends notifications to
 // StorageMonitor about the device attach/detach events.
 // This is a singleton class instantiated by StorageMonitorWin.
 class VolumeMountWatcherWin {
@@ skipping 63 matching lines @@
                           bool*, uint64*)> get_device_details_callback,
       base::WeakPtr<chrome::VolumeMountWatcherWin> volume_watcher);
 
   // Mark that a device we started a metadata check for has completed.
   virtual void DeviceCheckComplete(const base::FilePath& device_path);
 
   // Worker pool used to collect device information. Used because some
   // devices freeze workers trying to get device info, resulting in
   // shutdown hangs.
   scoped_refptr<base::SequencedWorkerPool> device_info_worker_pool_;
+  scoped_refptr<base::SequencedTaskRunner> task_runner_;
 
   // These closures can be overridden for testing to remove calling Windows API
   // functions.
   base::Callback<std::vector<base::FilePath>(void)>
       get_attached_devices_callback_;
   base::Callback<
       bool(const base::FilePath&, string16*,
            std::string*, string16*, bool*, uint64*)>
           get_device_details_callback_;
 
@@ skipping 16 matching lines @@
   // The notifications object to use to signal newly attached volumes. Only
   // removable devices will be notified.
   StorageMonitor::Receiver* notifications_;
 
   DISALLOW_COPY_AND_ASSIGN(VolumeMountWatcherWin);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_STORAGE_MONITOR_VOLUME_MOUNT_WATCHER_WIN_H_