Add function to document_loader to get PDF as pp::FileRef

pdf/chunk_stream.h

 // Copyright (c) 2010 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 PDF_CHUNK_STREAM_H_
 #define PDF_CHUNK_STREAM_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 18 matching lines @@
 
   // Returns vector of pairs where first is an offset, second is a size.
   bool GetMissedRanges(size_t offset, size_t size,
       std::vector<std::pair<size_t, size_t> >* ranges) const;
   bool IsRangeAvailable(size_t offset, size_t size) const;
   size_t GetFirstMissingByte() const;
 
   size_t GetLastByteBefore(size_t offset) const;
   size_t GetFirstByteAfter(size_t offset) const;
 
+  const std::vector<unsigned char>& data() const { return data_; }
+
  private:
   std::vector<unsigned char> data_;
 
   // Pair, first - begining of the chunk, second - size of the chunk.
   std::map<size_t, size_t> chunks_;
 };
 
 };  // namespace chrome_pdf
 
 #endif