Change HpackHuffmanDecoder::CanonicalToSource() return type.

net/spdy/core/hpack/hpack_huffman_decoder.h

Index: net/spdy/core/hpack/hpack_huffman_decoder.h
diff --git a/net/spdy/core/hpack/hpack_huffman_decoder.h b/net/spdy/core/hpack/hpack_huffman_decoder.h
index d33fa58174f3597da07db36caaa3f772538fefc1..8658b40f85372917cc6e3c000390a60c1a51e54e 100644
--- a/net/spdy/core/hpack/hpack_huffman_decoder.h
+++ b/net/spdy/core/hpack/hpack_huffman_decoder.h
@@ -57,9 +57,9 @@ class SPDY_EXPORT_PRIVATE HpackHuffmanDecoder {
   static HuffmanWord DecodeToCanonical(HuffmanCodeLength code_length,
                                        HuffmanWord bits);
 
-  // Converts a canonical symbol to the source symbol (the char in the original
+  // Converts a canonical symbol to the source symbol (the octet in the original
   // string that was encoded).
-  static char CanonicalToSource(HuffmanWord canonical);
+  static uint8_t CanonicalToSource(HuffmanWord canonical);
 };
 
 }  // namespace net