Merge third_party/libjingle/source/talk from https://chromium.googlesource.com/external/webrtc/trunk/talk.git at e25766c6c8584153a564a6af63bc92d2adcf1e94

This commit was generated by merge_from_chromium.py.

Change-Id: Ibd18865ec3df0234df8fccbe8d12ce072ff8d7c4