Add a Vp9Parser implementation

media/filters/vp9_raw_bits_reader.h

 // Copyright 2015 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 MEDIA_FILTERS_VP9_RAW_BITS_READER_
 #define MEDIA_FILTERS_VP9_RAW_BITS_READER_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 19 matching lines @@
   // gone beyond the end of available data.
   bool IsValid() const { return valid_; }
 
   // Returns how many bytes were read since the last Initialize() call.
   // Partial bytes will be counted as one byte. For example, it will return 1
   // if 3 bits were read.
   size_t GetBytesRead() const;
 
   // Reads one bit.
   // If the read goes beyond the end of buffer, the return value is undefined.
-  int ReadBit();
+  bool ReadBool();
 
   // Reads a literal with |bits| bits.
   // If the read goes beyond the end of buffer, the return value is undefined.
   int ReadLiteral(int bits);
 
   // Reads a signed literal with |bits| bits (not including the sign bit).
   // If the read goes beyond the end of buffer, the return value is undefined.
   int ReadSignedLiteral(int bits);
 
  private:
   scoped_ptr<BitReader> reader_;
 
   // Indicates if none of the reads since the last Initialize() call has gone
   // beyond the end of available data.
   bool valid_;
 
   DISALLOW_COPY_AND_ASSIGN(Vp9RawBitsReader);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_VP9_RAW_BITS_READER_