Hi Team, This is just merge of following: https://src.chromium.org/viewvc/blink?view=revision&revision=193289 It is partial merge that we don't have implemented other change, where we have to get rid of stuff. It is just initialization optimization to initiate 'm_bitMasks' in applicable case (i.e., less than 16). WebKit Source: https://github.com/WebKit/WebKit/blob/3a311fd2cd7e267ba71dca49060ad2c6be31f36d/Source/WebCore/platform/image-decoders/bmp/BMPImageReader.cpp#L103 This: if ((m_andMaskState == NotYetDecoded) && !m_buffer->hasAlpha() && (m_infoHeader.biBitCount < 16)) { It compiles. Thanks!