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For bit per component (bpc), PDF spec mentions that a RunLengthDecode or
DCTDecode filter shall always deliver 8-bit samples. However, some PDF files
don't follow this rule. We can find that filter is RunLengthDecode but bpc is
1 in the provided test file. In this case, pdfium will correct bpc to 8 but
the actual bpc is 1. It causes a failure because the data is much more than
the expected. To handle this case, pdfium doesn't correct bpc to 8 when the
original bpc is 1.
BUG=512557
R=tsepez@chromium.org
Review URL: https://codereview.chromium.org/1328213002 .
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