brandtr e78d26669e Make FakeEncoder and FakeH264Encoder thread safe.
The MultithreadedFakeH264Encoder is a derived class from FakeEncoder
and FakeH264Encoder, and these should thus also be thread safe.

TESTED=Ran "out/Tsan/video_engine_tests --gtest_filter="*Multithreaded*" --gtest_repeat=100" with is_debug=false, dcheck_always_on=true, is_tsan=true.

BUG=webrtc:6943

Review-Url: https://codereview.webrtc.org/2604403003
Cr-Commit-Position: refs/heads/master@{#16093}
2017-01-16 13:57:16 +00:00
..
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