Update Chromium

Changes:
8e6f5751e5 Restore media::FFmpegGlue::InitializeFFmpeg()
0c8d188f16 Add x86 target support for gn
2a52817b6e Fix creation of 'x86' toolchain in gn
3a84c2a8bc Add support for modules limiting jumbo width
c69fdae9c7 BASELINE: Update Chromium to 69.0.3497.113
3a783ba38b Merge remote-tracking branch 'origin/upstream-master' into 69-based
a4ecaddc7c Remove missing symlink to gen from perfetto/ui/src
3f8994c671 [Backport] Use newer GrGLFunction based on templated function types rather than pointers.

Change-Id: Ibfe810c1c9b88e25e9093fbb2aa213249f1a77bf
Reviewed-by: Peter Varga <pvarga@inf.u-szeged.hu>