chrome: Cleanup class/struct forward declarations

chrome/utility/media_galleries/pmp_column_reader.h

 // Copyright 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_UTILITY_MEDIA_GALLERIES_PMP_COLUMN_READER_H_
 #define CHROME_UTILITY_MEDIA_GALLERIES_PMP_COLUMN_READER_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "chrome/common/media_galleries/pmp_constants.h"
 
 namespace base {
 class File;
-class FilePath;
 }
 
 namespace picasa {
 
 // Reads a single PMP column from a file.
 class PmpColumnReader {
  public:
   PmpColumnReader();
   virtual ~PmpColumnReader();
 
@@ skipping 28 matching lines @@
 
   // Index of string start locations if fields are strings. Empty otherwise.
   std::vector<const char*> strings_;
 
   DISALLOW_COPY_AND_ASSIGN(PmpColumnReader);
 };
 
 }  // namespace picasa
 
 #endif  // CHROME_UTILITY_MEDIA_GALLERIES_PMP_COLUMN_READER_H_