Reason for revert: It looks like this broke the FYI bots. I tried updating libjingle_nacl.gyp, but the IOS build still failed because in Chrome it's configured to use NSS. See https://codereview.chromium.org/1316863012/. Original issue's description: > purge nss files and dependencies > > BUG=webrtc:4497 > > Committed: https://crrev.com/5647a2cf3db888195c928a1259d98f72f6ecbc15 > Cr-Commit-Position: refs/heads/master@{#9862} TBR=tommi@webrtc.org,kjellander@webrtc.org,torbjorng@webrtc.org NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=webrtc:4497 Review URL: https://codereview.webrtc.org/1311843006 Cr-Commit-Position: refs/heads/master@{#9867}