Add path filtering to DeviceMediaFileUtil

webkit/fileapi/media/filtering_file_enumerator.h

Index: webkit/fileapi/media/filtering_file_enumerator.h
diff --git a/webkit/fileapi/media/filtering_file_enumerator.h b/webkit/fileapi/media/filtering_file_enumerator.h
new file mode 100644
index 0000000000000000000000000000000000000000..88c2c105900777c8d1902758fecc86c5bad1a4e1
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+++ b/webkit/fileapi/media/filtering_file_enumerator.h
@@ -0,0 +1,40 @@
+// 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 WEBKIT_FILEAPI_MEDIA_FILTERING_FILE_ENUMERATOR_H_
+#define WEBKIT_FILEAPI_MEDIA_FILTERING_FILE_ENUMERATOR_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "webkit/fileapi/file_system_file_util.h"
+#include "webkit/fileapi/fileapi_export.h"
+#include "webkit/fileapi/media/media_path_filter.h"
+
+namespace fileapi {
+
+// This class wraps another file enumerator and filters out non-media files
+// from its result, refering given MediaPathFilter.
+class FILEAPI_EXPORT FilteringFileEnumerator
+    : public FileSystemFileUtil::AbstractFileEnumerator {
+ public:
+  FilteringFileEnumerator(
+      scoped_ptr<FileSystemFileUtil::AbstractFileEnumerator> base_enumerator,
+      MediaPathFilter* filter);
+  virtual ~FilteringFileEnumerator();
+
+  virtual FilePath Next() OVERRIDE;
+  virtual int64 Size() OVERRIDE;
+  virtual base::Time LastModifiedTime() OVERRIDE;
+  virtual bool IsDirectory() OVERRIDE;
+
+ private:
+  // The file enumerator to be wrapped.
+  scoped_ptr<FileSystemFileUtil::AbstractFileEnumerator> base_enumerator_;
+
+  // Path filter to filter out non-Media files.
+  MediaPathFilter* filter_;
+};
+
+}  // namespace fileapi
+
+#endif  // WEBKIT_FILEAPI_MEDIA_FILTERING_FILE_ENUMERATOR_H_