Another round of PDF plugin cleanups.

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>
 #include <utility>
 #include <vector>
 
 namespace chrome_pdf {
 
 // This class collects a chunks of data into one data stream. Client can check
 // if data in certain range is available, and get missing chunks of data.
 class ChunkStream {
  public:
   ChunkStream();
   ~ChunkStream();
 
   void Clear();
 
   void Preallocate(size_t stream_size);
-  size_t GetSize();
+  size_t GetSize() const;
 
   bool WriteData(size_t offset, void* buffer, size_t size);
   bool ReadData(size_t offset, size_t size, void* buffer) const;
 
   // 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;
 
   // Finds the first byte of the missing byte interval that offset belongs to.
   size_t GetFirstMissingByteInInterval(size_t offset) const;
   // Returns the last byte of the missing byte interval that offset belongs to.
   size_t GetLastMissingByteInInterval(size_t offset) const;
 
  private:
   std::vector<unsigned char> data_;
 
   // Pair, first - begining of the chunk, second - size of the chunk.
   std::map<size_t, size_t> chunks_;
 
   size_t stream_size_;
 };
 
 };  // namespace chrome_pdf
 
 #endif  // PDF_CHUNK_STREAM_H_