HASH_STRING_PIECE  442 base/strings/string_piece.h     HASH_STRING_PIECE(base::StringPiece, sp);
HASH_STRING_PIECE  448 base/strings/string_piece.h     HASH_STRING_PIECE(base::StringPiece16, sp16);
HASH_STRING_PIECE  455 base/strings/string_piece.h   HASH_STRING_PIECE(base::StringPiece, sp);
HASH_STRING_PIECE  458 base/strings/string_piece.h   HASH_STRING_PIECE(base::StringPiece16, sp16);