Minimizing impedance mismatch in complicated HDMI routing
You can always make the traces 10mil right after they leave the esd diodes, that's what I do, route 10mil as close as you can to the esd diodes, end that trace, now continue where you left off but now hit shift-w I think, and select 6mil trace width and carry on the last 1/8" or so to the esd diodes. 120ohms isn't that much of an impedance mismatch if you've only got a short length, you think the 1/16" bond wires in the chip (U9) are 100 ohms differential? transmission line effects can often be ignored when the discontinuities are less than 1/10 of a wavelength (include up to the 5th harmonic to be safe, so bandwidth in gbits/2*5 = 5th harmonic frequency (in ghz), speed of light/frequency = wavelength, if your discontinuity is less than 1/10 of a wavelength (1/20 is even better) then you probably don't have much to worry about. 120ohm lines wouldn't be a major issue unless the entire HDMI cable was 120 ohms, even then it'd probably still work as a lot of HDMI receivers now have cable equalization anyway which partially compensates for cabling oddities.