Request keyframe if too many packets are missing and NACK is disabled.

webrtc/video/end_to_end_tests.cc

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 #include <algorithm>
@@ skipping 984 matching lines @@
     bool received_pli_ GUARDED_BY(&crit_);
   } test(rtp_history_ms);
 
   RunBaseTest(&test, FakeNetworkPipe::Config());
 }
 
 TEST_F(EndToEndTest, ReceivesPliAndRecoversWithNack) {
   ReceivesPliAndRecovers(1000);
 }
 
-// TODO(pbos): Enable this when 2250 is resolved.
-TEST_F(EndToEndTest, DISABLED_ReceivesPliAndRecoversWithoutNack) {
+TEST_F(EndToEndTest, ReceivesPliAndRecoversWithoutNack) {
   ReceivesPliAndRecovers(0);
 }
 
 TEST_F(EndToEndTest, UnknownRtpPacketGivesUnknownSsrcReturnCode) {
   class PacketInputObserver : public PacketReceiver {
    public:
     explicit PacketInputObserver(PacketReceiver* receiver)
         : receiver_(receiver), delivered_packet_(EventWrapper::Create()) {}
 
     EventTypeWrapper Wait() {
@@ skipping 2174 matching lines @@
   EXPECT_TRUE(default_receive_config.rtp.rtx.empty())
       << "Enabling RTX requires rtpmap: rtx negotiation.";
   EXPECT_TRUE(default_receive_config.rtp.extensions.empty())
       << "Enabling RTP extensions require negotiation.";
 
   VerifyEmptyNackConfig(default_receive_config.rtp.nack);
   VerifyEmptyFecConfig(default_receive_config.rtp.fec);
 }
 
 }  // namespace webrtc