Roll chromium_revision ea769fd..6455c69
Roll chromium_revision ea769fd..6455c69

Mainly to pick up https://codereview.chromium.org/552013004

Summary of changes (git diff ea769fd..6455c69 DEPS):
* third_party/libvpx ceebbcc0..d95585f
* third_party/swarming e7d8b98..14b5fd82
* tools/gyp 1972:1973

R=pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/29379004

git-svn-id: 917f5d3ca488f358c4d40eaec14422cf392ccec9@7128 4adac7df-926f-26a2-2b94-8c16560cd09d

ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,mwgoldsmith/libilbc,TimothyGu/libilbc,mwgoldsmith/libilbc,mwgoldsmith/ilbc,mwgoldsmith/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,mwgoldsmith/ilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,mwgoldsmith/ilbc,TimothyGu/libilbc,mwgoldsmith/ilbc,mwgoldsmith/libilbc,TimothyGu/libilbc