Update RateStatistics to handle too-little-data case.

webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_single_stream_unittest.cc

Index: webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_single_stream_unittest.cc
diff --git a/webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_single_stream_unittest.cc b/webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_single_stream_unittest.cc
index 97e3abaa32b3833e64fd5a22a5884d0abe0b2a67..98f495eac844cac50e1dead21f7fa592855be742 100644
--- a/webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_single_stream_unittest.cc
+++ b/webrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_single_stream_unittest.cc
@@ -35,7 +35,7 @@ TEST_F(RemoteBitrateEstimatorSingleTest, RateIncreaseReordering) {
 }
 
 TEST_F(RemoteBitrateEstimatorSingleTest, RateIncreaseRtpTimestamps) {
-  RateIncreaseRtpTimestampsTestHelper(1240);
+  RateIncreaseRtpTimestampsTestHelper(1267);
 }
 
 TEST_F(RemoteBitrateEstimatorSingleTest, CapacityDropOneStream) {
@@ -47,15 +47,15 @@ TEST_F(RemoteBitrateEstimatorSingleTest, CapacityDropOneStreamWrap) {
 }
 
 TEST_F(RemoteBitrateEstimatorSingleTest, CapacityDropTwoStreamsWrap) {
-  CapacityDropTestHelper(2, true, 600);
+  CapacityDropTestHelper(2, true, 767);
 }
 
 TEST_F(RemoteBitrateEstimatorSingleTest, CapacityDropThreeStreamsWrap) {
-  CapacityDropTestHelper(3, true, 767);
+  CapacityDropTestHelper(3, true, 567);
 }
 
 TEST_F(RemoteBitrateEstimatorSingleTest, CapacityDropThirteenStreamsWrap) {
-  CapacityDropTestHelper(13, true, 733);
+  CapacityDropTestHelper(13, true, 567);
 }
 
 TEST_F(RemoteBitrateEstimatorSingleTest, CapacityDropNineteenStreamsWrap) {