Make overuse estimator one dimensional.

webrtc/modules/rtp_rtcp/source/rtcp_format_remb_unittest.cc

Index: webrtc/modules/rtp_rtcp/source/rtcp_format_remb_unittest.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_format_remb_unittest.cc b/webrtc/modules/rtp_rtcp/source/rtcp_format_remb_unittest.cc
index 9652a53487da8edd8a6f278150dc32b9b1edc6c3..284a12e4c3399da938e1168a9c559a04488aa2bf 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_format_remb_unittest.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_format_remb_unittest.cc
@@ -59,8 +59,7 @@ class TestTransport : public Transport {
 class RtcpFormatRembTest : public ::testing::Test {
  protected:
   RtcpFormatRembTest()
-      : over_use_detector_options_(),
-        system_clock_(Clock::GetRealTimeClock()),
+      : system_clock_(Clock::GetRealTimeClock()),
         dummy_rtp_rtcp_impl_(nullptr),
         receive_statistics_(ReceiveStatistics::Create(system_clock_)),
         rtcp_sender_(nullptr),
@@ -73,7 +72,6 @@ class RtcpFormatRembTest : public ::testing::Test {
   void SetUp() override;
   void TearDown() override;
 
-  OverUseDetectorOptions over_use_detector_options_;
   Clock* system_clock_;
   ModuleRtpRtcpImpl* dummy_rtp_rtcp_impl_;
   rtc::scoped_ptr<ReceiveStatistics> receive_statistics_;