Remove all uses of the HAVE_CONFIG_H define.

Remove all uses of the HAVE_CONFIG_H define.

BUG=
R=henrik.lundin@webrtc.org, pthatcher@google.com, stefan@webrtc.org, tommi@webrtc.org

Committed: https://crrev.com/b252856d10a227ae2497e583ea07fda8c1ed6332
Cr-Commit-Position: refs/heads/master@{#12141}

[kjellander_webrtc, 2016-03-23 19:27:45]

kjellander@webrtc.org changed reviewers:
+ henrik.lundin@webrtc.org, pthatcher@webrtc.org, stefan@webrtc.org,
tina.legrand@webrtc.org, tommi@webrtc.org

[kjellander_webrtc, 2016-03-23 19:27:45]

Adding a bunch of folks to make sure I get enough input on this.

Background:
I recently hit a new problem with Clang on Windows in my
https://codereview.chromium.org/1808233002/ as part of the libjingle work I'm
doing. This could be one way to solve it. 

The HAVE_CONFIG_H define is never set in our own builds, but I don't know for
externals, since there are at least some places it's set in the Chromium code
base:
https://code.google.com/p/chromium/codesearch#search/&q=HAVE_CONFIG_H%20f:gyp...

One other option would be to just rename our webrtc/config.h file to something
else, like webrtc/rtc_config.h. That seems simpler, but I also like to clean up
code - so I would still prefer this unless the risk is too high.
I suspect these old config.h includes comes from "standard behavior" from the
GNU autotools way of building code.
That said, it may be possible that downstream projects to rely on a custom
config.h file they provide to be loaded, but in that case they should be able to
find other (better) ways to manipulate the code being built, right?

[tommi, 2016-03-24 00:10:20]

lgtm

[pthatcher, 2016-03-25 21:21:03]

pthatcher@google.com changed reviewers:
+ pthatcher@google.com

[pthatcher, 2016-03-25 21:21:03]

lgtm, as long as it doesn't break anything, I'm all for deleting unused things.

[stefan-webrtc, 2016-03-29 11:58:46]

lgtm

[hlundin-webrtc, 2016-03-29 15:44:00]

webrtc/modules/audio_coding/codecs/g722: lgtm

[commit-bot: I haz the power, 2016-03-29 15:47:32]

Description was changed from

==========
Remove all uses of the HAVE_CONFIG_H define.

BUG=
==========

to

==========
Remove all uses of the HAVE_CONFIG_H define.

BUG=
R=henrik.lundin@webrtc.org, pthatcher@google.com, stefan@webrtc.org,
tommi@webrtc.org

Committed: https://crrev.com/b252856d10a227ae2497e583ea07fda8c1ed6332
Cr-Commit-Position: refs/heads/master@{#12141}
==========

[commit-bot: I haz the power, 2016-03-29 15:47:33]

Patchset 2 (id:??) landed as
https://crrev.com/b252856d10a227ae2497e583ea07fda8c1ed6332
Cr-Commit-Position: refs/heads/master@{#12141}

[kjellander_webrtc, 2016-03-29 15:52:04]

On 2016/03/29 15:47:33, commit-bot: I haz the power wrote:
> Patchset 2 (id:??) landed as
> https://crrev.com/b252856d10a227ae2497e583ea07fda8c1ed6332
> Cr-Commit-Position: refs/heads/master@{#12141}

Sorry about accidentally screwing up the rebase resulting in adding
webrtc/base/sslstreamadapterhelper.cc again. Removing it again in
https://codereview.webrtc.org/1842773002