Update mini_chromium to 7800285e83df4286981bb933e3335edade7c8308
Update mini_chromium to 7800285e83df4286981bb933e3335edade7c8308

7800285e83df Don't #undef UMA_HISTOGRAM_UNUSED

Change-Id: I6a694ae17dcafb2663485a0fecc551dad661449c
Reviewed-on: https://chromium-review.googlesource.com/384031
Reviewed-by: Mark Mentovai <f1b5a91d4d6ad523f2610114591c007e75d15084@chromium.org>

atom/crashpad,atom/crashpad,chromium/crashpad,chromium/crashpad,chromium/crashpad,atom/crashpad