Merge third_party/libjingle/source/talk from https://chromium.googlesource.com/external/webrtc/trunk/talk.git at f97800413f157c911aefbf5be167dbd4806a2323

This commit was generated by merge_from_chromium.py.

Change-Id: Ie174f5f2a901346a28e1887ee81dcd22b2fc6dff