Reland Allow remote fingerprint update during a call

Allow remote fingerprint update during a call

Changes include the following
1. modify FakeDtlsIdentityStore to support alternate certificate so we could have a different fingerprint in test case.
2. dtlstransportchannel can accept a new fingerprint and trigger DTLS handshake.
3. #2 will trigger new signal on the media side to reset SRTP context. Only reset SRTP context when we are using DTLS (not SDES).
4. Test cases for caller or callee are transfees.

TBR=pthatcher@webrtc.org
BUG=webrtc:3618
This is a reland of https://codereview.webrtc.org/1453523002

Committed: https://chromium.googlesource.com/external/webrtc/+/1218d7ad2fac035376914bd0649fe99e657b33d3

[guoweis_webrtc, 2015-12-05 17:58:23]

Description was changed from

==========
Allow remote fingerprint update during a call

Changes include the following
1. modify FakeDtlsIdentityStore to support alternate certificate so we could
have a different fingerprint in test case.
2. dtlstransportchannel can accept a new fingerprint and trigger DTLS handshake.
3. #2 will trigger new signal on the media side to reset SRTP context. Only
reset SRTP context when we are using DTLS (not SDES).
4. Test cases for caller or callee are transfees.

BUG=webrtc:3618
R=pthatcher@webrtc.org
==========

to

==========
Allow remote fingerprint update during a call

Changes include the following
1. modify FakeDtlsIdentityStore to support alternate certificate so we could
have a different fingerprint in test case.
2. dtlstransportchannel can accept a new fingerprint and trigger DTLS handshake.
3. #2 will trigger new signal on the media side to reset SRTP context. Only
reset SRTP context when we are using DTLS (not SDES).
4. Test cases for caller or callee are transfees.

BUG=webrtc:3618
R=pthatcher@webrtc.org

This is a reland of https://codereview.webrtc.org/1453523002
==========

[guoweis_webrtc, 2015-12-05 17:59:52]

Description was changed from

==========
Allow remote fingerprint update during a call

Changes include the following
1. modify FakeDtlsIdentityStore to support alternate certificate so we could
have a different fingerprint in test case.
2. dtlstransportchannel can accept a new fingerprint and trigger DTLS handshake.
3. #2 will trigger new signal on the media side to reset SRTP context. Only
reset SRTP context when we are using DTLS (not SDES).
4. Test cases for caller or callee are transfees.

BUG=webrtc:3618
R=pthatcher@webrtc.org

This is a reland of https://codereview.webrtc.org/1453523002
==========

to

==========
Allow remote fingerprint update during a call

Changes include the following
1. modify FakeDtlsIdentityStore to support alternate certificate so we could
have a different fingerprint in test case.
2. dtlstransportchannel can accept a new fingerprint and trigger DTLS handshake.
3. #2 will trigger new signal on the media side to reset SRTP context. Only
reset SRTP context when we are using DTLS (not SDES).
4. Test cases for caller or callee are transfees.

TBR=pthatcher@webrtc.org
BUG=webrtc:3618

This is a reland of https://codereview.webrtc.org/1453523002
==========

[commit-bot: I haz the power, 2015-12-05 18:00:07]

Description was changed from

==========
Allow remote fingerprint update during a call

Changes include the following
1. modify FakeDtlsIdentityStore to support alternate certificate so we could
have a different fingerprint in test case.
2. dtlstransportchannel can accept a new fingerprint and trigger DTLS handshake.
3. #2 will trigger new signal on the media side to reset SRTP context. Only
reset SRTP context when we are using DTLS (not SDES).
4. Test cases for caller or callee are transfees.

TBR=pthatcher@webrtc.org
BUG=webrtc:3618

This is a reland of https://codereview.webrtc.org/1453523002
==========

to

==========
Allow remote fingerprint update during a call

Changes include the following
1. modify FakeDtlsIdentityStore to support alternate certificate so we could
have a different fingerprint in test case.
2. dtlstransportchannel can accept a new fingerprint and trigger DTLS handshake.
3. #2 will trigger new signal on the media side to reset SRTP context. Only
reset SRTP context when we are using DTLS (not SDES).
4. Test cases for caller or callee are transfees.

TBR=pthatcher@webrtc.org
BUG=webrtc:3618

This is a reland of https://codereview.webrtc.org/1453523002

Committed: https://crrev.com/1218d7ad2fac035376914bd0649fe99e657b33d3
Cr-Commit-Position: refs/heads/master@{#10903}
==========

[commit-bot: I haz the power, 2015-12-05 18:00:07]

Patchset 1 (id:??) landed as
https://crrev.com/1218d7ad2fac035376914bd0649fe99e657b33d3
Cr-Commit-Position: refs/heads/master@{#10903}

[guoweis_webrtc, 2015-12-05 18:00:08]

Description was changed from

==========
Allow remote fingerprint update during a call

Changes include the following
1. modify FakeDtlsIdentityStore to support alternate certificate so we could
have a different fingerprint in test case.
2. dtlstransportchannel can accept a new fingerprint and trigger DTLS handshake.
3. #2 will trigger new signal on the media side to reset SRTP context. Only
reset SRTP context when we are using DTLS (not SDES).
4. Test cases for caller or callee are transfees.

TBR=pthatcher@webrtc.org
BUG=webrtc:3618

This is a reland of https://codereview.webrtc.org/1453523002

Committed: https://crrev.com/1218d7ad2fac035376914bd0649fe99e657b33d3
Cr-Commit-Position: refs/heads/master@{#10903}
==========

to

==========
Allow remote fingerprint update during a call

Changes include the following
1. modify FakeDtlsIdentityStore to support alternate certificate so we could
have a different fingerprint in test case.
2. dtlstransportchannel can accept a new fingerprint and trigger DTLS handshake.
3. #2 will trigger new signal on the media side to reset SRTP context. Only
reset SRTP context when we are using DTLS (not SDES).
4. Test cases for caller or callee are transfees.

TBR=pthatcher@webrtc.org
BUG=webrtc:3618

This is a reland of https://codereview.webrtc.org/1453523002

Committed:
https://chromium.googlesource.com/external/webrtc/+/1218d7ad2fac035376914bd06...
==========

[guoweis_webrtc, 2015-12-05 18:00:09]

Committed patchset #1 (id:1) manually as
1218d7ad2fac035376914bd0649fe99e657b33d3 (presubmit successful).