Merge from Chromium at DEPS revision 251904

This commit was generated by merge_to_master.py.

Change-Id: I1524979ae2ddaee9eeb385f24bee6841775e4855
tree: 36f7d9bb640ecd3cdc4a94cfe0160b44e833d7a0
  1. config/
  2. srtp/
  3. .gitignore
  4. libsrtp.gyp
  5. README.chromium