Fix race in WebRtcVideoEngine2Tests, improve coverage.

webrtc/media/engine/fakewebrtccall.cc

Index: webrtc/media/engine/fakewebrtccall.cc
diff --git a/webrtc/media/engine/fakewebrtccall.cc b/webrtc/media/engine/fakewebrtccall.cc
index 9a05ae67e4a72669a6881fa29b2eebea46d060b5..6a936d6981aa711d7b5246c89115d819266ba316 100644
--- a/webrtc/media/engine/fakewebrtccall.cc
+++ b/webrtc/media/engine/fakewebrtccall.cc
@@ -333,7 +333,9 @@ FakeCall::FakeCall(const webrtc::Call::Config& config)
       audio_network_state_(webrtc::kNetworkUp),
       video_network_state_(webrtc::kNetworkUp),
       num_created_send_streams_(0),
-      num_created_receive_streams_(0) {}
+      num_created_receive_streams_(0),
+      audio_transport_overhead_(0),
+      video_transport_overhead_(0) {}
 
 FakeCall::~FakeCall() {
   EXPECT_EQ(0u, video_send_streams_.size());