Adding third_party/openh264 build files for encoding

third_party/openh264/openh264_args.gni

+# Copyright 2015 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/config/chrome_build.gni")
+
+declare_args() {
+  # Enable this to build OpenH264.
+  # CHECK THE OPENH264 LICENSE BEFORE BUILDING. Chrome builds this by default,
+  # but non-Chrome builds need this to default to false due to license and
+  # patent reasons, see http://www.openh264.org/. In both cases the default
+  # value can be overwritten.
+  use_openh264 = true # is_chrome_branded

[brettw, 2015/11/25 19:26:34]

I think you meant to delete the "true #"

If you want to keep this as-is, remove the import at the top and comment with a
TODO or something if it should be changed in the future.

[hbos_chromium, 2015/11/26 12:19:24]

Nah this is just to force the non-chrome chromium bots to compile it when I
upload a patch set, I'll change it back to is_chrome_branded before landing
(same with gyp file). I've added "COMMIT=false" to the CL description to make it
impossible to accidentally land it before then.

+}