Re-enable RestartingSendStreamPreservesRtpState.

webrtc/video/end_to_end_tests.cc

Index: webrtc/video/end_to_end_tests.cc
diff --git a/webrtc/video/end_to_end_tests.cc b/webrtc/video/end_to_end_tests.cc
index e2450d9c7db9c98652dffc74ba8aacb4e2b6c1a6..b08f23d74eac334c6ceefc8e8fcd043e907c0b14 100644
--- a/webrtc/video/end_to_end_tests.cc
+++ b/webrtc/video/end_to_end_tests.cc
@@ -2737,6 +2737,8 @@ void EndToEndTest::TestRtpStatePreservation(bool use_rtx) {
         last_observed_sequence_number_[ssrc] = sequence_number;
         last_observed_timestamp_[ssrc] = timestamp;
       } else {
+        // We shouldn't get replays of previous sequence numbers.
+        EXPECT_NE(sequence_number, last_observed_sequence_number_[ssrc]);
         // Verify sequence numbers are reasonably close.
         uint32_t extended_sequence_number = sequence_number;
         // Check for roll-over.
@@ -2880,7 +2882,7 @@ void EndToEndTest::TestRtpStatePreservation(bool use_rtx) {
   DestroyStreams();
 }
 
-TEST_F(EndToEndTest, DISABLED_RestartingSendStreamPreservesRtpState) {
+TEST_F(EndToEndTest, RestartingSendStreamPreservesRtpState) {
   TestRtpStatePreservation(false);
 }