Add webrtc/base to deprecated APIs.

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index fe9d0104a908878dc7dbcab59bf0e7e7405a269d..10838daf7dab02efb97fea284cf3adb59ea3c0de 100755
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -24,6 +24,7 @@ CPPLINT_DIRS = [
 NATIVE_API_DIRS = (
   'talk/app/webrtc',
   'webrtc',
+  'webrtc/base',  # DEPRECATED (will go away).

[kwiberg-webrtc, 2015/12/03 13:44:27]

What does DEPRECATED mean? That webrtc/base is going away? That external users
shouldn't include stuff from there directly? Indirectly?

[phoglund, 2015/12/03 13:58:55]

I guess what we want to say here is "don't depend on this thing directly."

[kjellander_webrtc, 2015/12/03 14:03:53]

I guess it could be phrased differently, but I mean going away from this list of
"supported" APIs, since we don't want to support it (but haven't been able to
update downstream code yet).
If they use another API that includes files from webrtc/base indirectly, that's
not their problem (just ours).
Yes.

[kwiberg-webrtc, 2015/12/03 14:52:28]

OK, sounds good. Perhaps a comment on line 24 that explains that this is the
list of directories where we don't change headers willy-nilly, and that
DEPRECATED means that the entry in question is going away from the list?

[kjellander_webrtc, 2015/12/03 15:12:34]

You're right. I added a descriptive comment now and removed the confusing "will
go away" text.

   'webrtc/common_audio/include',  # DEPRECATED (will go away).
   'webrtc/modules/audio_coding/include',
   'webrtc/modules/audio_conference_mixer/include',  # DEPRECATED (will go away).