Comment 30 for bug 386132

pngcheck reports that the png.C2.png file has a gAMA and a cHRM
chunk:

  chunk gAMA at offset 0x00025, length 4: 0.45000
  chunk cHRM at offset 0x00035, length 32
    White x = 0.283 y = 0.298, Red x = 0.625 y = 0.34
    Green x = 0.285 y = 0.605, Blue x = 0.15 y = 0.065

Those data values seem to be OK.