Structure of BBR's implementation,some main classes and functions which are going to be used

webrtc/modules/remote_bitrate_estimator/BUILD.gn

Index: webrtc/modules/remote_bitrate_estimator/BUILD.gn
diff --git a/webrtc/modules/remote_bitrate_estimator/BUILD.gn b/webrtc/modules/remote_bitrate_estimator/BUILD.gn
index 04f2f7cc5597b1756fd562f0258f9ef9e6c7edb4..49b5d3285d8c82230a9fdaf31369e0d9f71330ea 100644
--- a/webrtc/modules/remote_bitrate_estimator/BUILD.gn
+++ b/webrtc/modules/remote_bitrate_estimator/BUILD.gn
@@ -72,6 +72,11 @@ if (rtc_include_tests) {
       "test/bwe_test_framework.cc",
       "test/bwe_test_framework.h",
       "test/bwe_test_logging.h",
+      "test/estimators/bbr.cc",
+      "test/estimators/bbr.h",
+      "test/estimators/congestion_window.h",
+      "test/estimators/max_bandwidth_filter.h",
+      "test/estimators/min_rtt_filter.h",
       "test/estimators/nada.cc",
       "test/estimators/nada.h",
       "test/estimators/remb.cc",