Add initial chromium compile support

This change updates various BUILD.gn files to work in both standalone
builds and Chromium builds.  There are several main changes that have to
take place:

 1. Change abseil include paths so we can use any abseil location.
 2. Change logging macros to use Chromium's //base/logging.h.
 3. Separate out files with the GN variable build_with_chromium.
 4. Add a new config to each target to maintain our include structure
    and change over the logging macros.

Change-Id: I066698cd07b2315842c700b5adf01bdc656db9be
Reviewed-on: https://chromium-review.googlesource.com/c/openscreen/+/1534469
Commit-Queue: Brandon Tolsch <btolsch@chromium.org>
Reviewed-by: Peter Thatcher <pthatcher@google.com>
Reviewed-by: Jordan Bayles <jophba@chromium.org>
Reviewed-by: Yuri Wiitala <miu@chromium.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/build/config/services.gni b/build/config/services.gni
new file mode 100644
index 00000000..1d3d3466
--- /dev/null
+++ b/build/config/services.gni
@@ -0,0 +1,13 @@
+# Copyright 2019 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build_overrides/build.gni")
+
+use_chromium_quic = true
+use_mdns_responder = true
+
+if (build_with_chromium) {
+  use_chromium_quic = false
+  use_mdns_responder = false
+}