Relanding "Pass time constant to bwe smoothing filter."

webrtc/test/mock_voe_channel_proxy.h

Index: webrtc/test/mock_voe_channel_proxy.h
diff --git a/webrtc/test/mock_voe_channel_proxy.h b/webrtc/test/mock_voe_channel_proxy.h
index 3676e89153821e94c1f4cec7f83831efac64a765..4f5a0d21569118e0efed09335207adb9502d0b7f 100644
--- a/webrtc/test/mock_voe_channel_proxy.h
+++ b/webrtc/test/mock_voe_channel_proxy.h
@@ -45,7 +45,7 @@ class MockVoEChannelProxy : public voe::ChannelProxy {
   MOCK_METHOD2(SetSendTelephoneEventPayloadType, bool(int payload_type,
                                                       int payload_frequency));
   MOCK_METHOD2(SendTelephoneEventOutband, bool(int event, int duration_ms));
-  MOCK_METHOD1(SetBitrate, void(int bitrate_bps));
+  MOCK_METHOD2(SetBitrate, void(int bitrate_bps, int64_t probing_interval_ms));
   // TODO(solenberg): Talk the compiler into accepting this mock method:
   // MOCK_METHOD1(SetSink, void(std::unique_ptr<AudioSinkInterface> sink));
   MOCK_METHOD1(SetInputMute, void(bool muted));