This CL fixes building the 'all' target in a Chromium checkout with the following args.gn:
is_debug = false
is_clang = false
use_sysroot = false
proprietary_codecs = true
ffmpeg_branding = "Chrome"
is_component_build = true
enable_nacl = false
use_goma = true

Bug chromium:697528
Change-Id: Ie725988e8a1cb9ee672eb1e8e20d718ac91004fa

Change-Id: Ie725988e8a1cb9ee672eb1e8e20d718ac91004fa
Reviewed-on: https://swiftshader-review.googlesource.com/8888Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Tom Anderson <thomasanderson@google.com>