Add FilePath to base namespace.

chrome/browser/media_gallery/win/recursive_mtp_device_object_enumerator.h

 // Copyright (c) 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_GALLERY_WIN_RECURSIVE_MTP_DEVICE_OBJECT_ENUMERATOR_H_
 #define CHROME_BROWSER_MEDIA_GALLERY_WIN_RECURSIVE_MTP_DEVICE_OBJECT_ENUMERATOR_H_
 
 #include <portabledeviceapi.h>
 
 #include <queue>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/string16.h"
 #include "base/threading/thread_checker.h"
 #include "base/time.h"
 #include "base/win/scoped_comptr.h"
 #include "chrome/browser/media_gallery/win/mtp_device_object_entry.h"
 #include "webkit/fileapi/file_system_file_util.h"
 
+namespace base {
 class FilePath;
+}
 
 namespace chrome {
 
 class MTPDeviceObjectEnumerator;
 
 // RecursiveMTPDeviceObjectEnumerator is used to recursively enumerate the
 // media transfer protocol (MTP) device storage objects from a given media file
 // object entries set. RecursiveMTPDeviceObjectEnumerator communicates with the
 // MTP device to get the subdirectory object entries.
 // RecursiveMTPDeviceObjectEnumerator uses MTPDeviceObjectEnumerator to iterate
 // the current directory objects. RecursiveMTPDeviceObjectEnumerator may only be
 // used on a single thread.
 class RecursiveMTPDeviceObjectEnumerator
     : public fileapi::FileSystemFileUtil::AbstractFileEnumerator {
  public:
   // MTP |device| should already be initialized and ready for communication.
   RecursiveMTPDeviceObjectEnumerator(IPortableDevice* device,
                                      const MTPDeviceObjectEntries& entries);
   virtual ~RecursiveMTPDeviceObjectEnumerator();
 
   // AbstractFileEnumerator:
-  virtual FilePath Next() OVERRIDE;
+  virtual base::FilePath Next() OVERRIDE;
   virtual int64 Size() OVERRIDE;
   virtual bool IsDirectory() OVERRIDE;
   virtual base::Time LastModifiedTime() OVERRIDE;
 
  private:
   // Returns an enumerator for the next non-empty, untraversed subdirectory
   // from |untraversed_directory_object_ids_|.
   // Returns NULL if all subdirectories have been traversed.
   // The caller owns the returned MTPDeviceObjectEnumerator.
   scoped_ptr<MTPDeviceObjectEnumerator> GetNextSubdirectoryEnumerator();
 
   // The portable device.
   base::win::ScopedComPtr<IPortableDevice> device_;
 
   // Enumerator to access current directory Id/path entries.
   scoped_ptr<MTPDeviceObjectEnumerator> current_enumerator_;
 
   // Queue of untraversed subdirectories.
   std::queue<string16> untraversed_directory_object_ids_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(RecursiveMTPDeviceObjectEnumerator);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERY_WIN_RECURSIVE_MTP_DEVICE_OBJECT_ENUMERATOR_H_