Ability to specify KeyType (RSA, ECDSA) in CreatePeerConnection

THE FOLLOWING CL MAKES THIS CL OBSOLETE:
https://codereview.webrtc.org/1269843005/

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The KeyType is passed around as follows in libjingle:
PeerConnectionFactory::CreatePeerConnection -> PeerConnection::Initialize -> WebRtcSession::Initialize -> WebRtcSessionDescriptionFactory::WebRtcSessionDescriptionFactory

The KeyType will be used to generate an SSLIdentity. It will become relevant once these CLs lands:
https://codereview.webrtc.org/1176383004
https://codereview.webrtc.org/1189583002

[hbos, 2015-06-15 12:35:47]

hbos@webrtc.org changed reviewers:
+ tommi@webrtc.org, torbjorng@webrtc.org

[hbos, 2015-06-15 12:37:34]

The passing around of KeyType-related changes of
https://codereview.webrtc.org/1151943005/.

[hbos, 2015-06-15 12:54:41]

I should probably temporarily add a
PeerConnectionFactoryInterface::CreatePeerConnection which does not take a
KeyType to avoid breaking chromium.

[hbos, 2015-06-16 07:50:34]

PTAL tommi.

(I realized I could have made CreatePeerConnection's KeyType a param with a
default value to avoid breaking chromium but then it would have had to be at the
end and I didn't like that param order.)

[hbos, 2015-06-16 07:55:10]

Patchset #3 (id:40001) has been deleted

[hbos, 2015-06-18 09:52:52]

hbos@webrtc.org changed reviewers:
+ magjed@webrtc.org

[hbos, 2015-06-18 09:52:53]

PTAL magjed, maybe you can review and then help me land this? I'm OOO for the
next 1½ weeks.

[hbos, 2015-08-04 12:54:56]

This CL has probably become obsolete. I will close it shortly.