This is the standalone version of GN used currently solely for building
Chromium. An upstream bug report is available at
https://crbug.com/504074 to support a standalone build without needing
various components from the Chromium source tree.

Because there isn't a standalone vrsion available, I'm choosing
0.0.0.${date} as the version scheme here so that we don't conflict with
versioned releases from upstream someday[TM].

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

This only uses the most basic GN flags which should represent the GYP
flags we had before. In order to get rid most of the GYP cruft, we now
have common.nix and common-gn.nix which are mostly the same, just that
the latter is only for GN builds.

The GN implementation is far from complete and currently not even
builds, so we need more work to get the beta and dev channels building.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

The oldest version we build is version 53, so we no longer need this
patch.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

fixes NixOS#19565

see NixOS#19680

see NixOS#19680

This should now be the upstream default and there also is no more flag
for GN to set it, so we'll no longer need it on our side as well.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

Previously I've added the extra file common-gn.nix in addition to
common.nix, so we can possibly have a smooth transition from current
stable to the new version 54.

Unfortunately, version 53 is already EOL and we have to move to version
54 as soon as possible so we can only use GN and thus it doesn't make
sense to provide expressions for GYP anymore.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

Seems that these libraries aren't the ones Chromium is expecting to be,
so let's switch to use the bundled version of these libraries instead.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

So far we had the bundled Flash player plugin that came with Chrome, but
since version 54 the Chrome package doesn't include PPAPI Flash anymore.

Instead we're going to download the PPAPI Flash plugin directly from
Adobe and try to use them for all release channels of Chromium.

Of course it would be nice if we'd have an updater for it but for now
it's important that we don't break things for people who are currently
forced to use Flash.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

Overview of updated versions:

stable: 54.0.2840.71 -> 54.0.2840.90
beta:   55.0.2883.21 -> 55.0.2883.35
dev:    56.0.2897.0  -> 56.0.2906.0

This is to get our Chromium versions in par with the latest upstream
ones before merging in the GN migration changes.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>