Fix memory leak in FakeSSLCertificate::GetChain(), discovered by Linux Memcheck build/try bots.
Fix memory leak in FakeSSLCertificate::GetChain(), discovered by Linux Memcheck build/try bots.

TBR=hellner
BUG=

Review URL: https://webrtc-codereview.appspot.com/18969004

Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 42d65ce8d75005758e69c5f6a84684d2b3132e53

sippet/talk,sippet/talk,sippet/talk,sippet/talk,sippet/talk