Remove CheckForUpdate and Update which are no longer used. I'll submit this once chromeos-chrome's ebuild file gets new enough. BUG=chromium-os:16563 TEST=gmerge libcros, and conform chrome boots Change-Id: I856d21020b47b6d66ccd49c0f2216a55448729f3 Reviewed-on: http://gerrit.chromium.org/gerrit/3956 Reviewed-by: Satoru Takabayashi <[email protected]> Tested-by: Satoru Takabayashi <[email protected]>