GN: Port frame_analyzer and rgba_to_i420_converter targets

GN: Port frame_analyzer and rgba_to_i420_converter targets

Original patch by tfarina@chromium.org at
https://webrtc-codereview.appspot.com/42999004/

BUG=chromium:461019, webrtc:4504
TESTED=Tested on Linux with the following command lines:
$ gn gen/out/Debug --args='is_debug=true build_with_chromium=false'
$ ninja -C out/Debug frame_analyzer rgba_to_i420_converter
Also successfully compiled from a Chromium checkout using the steps in webrtc:4504.

R=tfarina@chromium.org

Committed: https://crrev.com/67bcb609a33a551687e382d29c673bcb27fe42a4
Cr-Commit-Position: refs/heads/master@{#10193}

[kjellander_webrtc, 2015-10-06 21:38:30]

kjellander@webrtc.org changed reviewers:
+ phoglund@webrtc.org, tfarina@chromium.org

[kjellander_webrtc, 2015-10-06 21:38:31]

Cleaning up old issues... and this one seems to have resolved itself by just
waiting :)

[tfarina, 2015-10-07 01:05:00]

Happy this works now. Assuming you tested this on Chromium as well and it worked
(I see you noted this in the CL description), LGTM.

My feeling is that grunell work on crbug.com/468375 might have helped with this.

[kjellander_webrtc, 2015-10-07 06:43:13]

Committed patchset #1 (id:1) manually as
67bcb609a33a551687e382d29c673bcb27fe42a4 (presubmit successful).

[commit-bot: I haz the power, 2015-10-07 06:43:16]

Patchset 1 (id:??) landed as
https://crrev.com/67bcb609a33a551687e382d29c673bcb27fe42a4
Cr-Commit-Position: refs/heads/master@{#10193}