Enable -Winconsistent-missing-override flag.

webrtc/api/webrtcsession_unittest.cc

 /*
  *  Copyright 2012 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.
  */
 
@@ skipping 173 matching lines @@
         ASSERT(false);
     }
 
     // The ICE gathering state should always be Gathering when a candidate is
     // received (or possibly Completed in the case of the final candidate).
     EXPECT_NE(PeerConnectionInterface::kIceGatheringNew, ice_gathering_state_);
   }
 
   // Some local candidates are removed.
   void OnIceCandidatesRemoved(
-      const std::vector<cricket::Candidate>& candidates) {
+      const std::vector<cricket::Candidate>& candidates) override {
     num_candidates_removed_ += candidates.size();
   }
 
   bool oncandidatesready_;
   std::vector<cricket::Candidate> mline_0_candidates_;
   std::vector<cricket::Candidate> mline_1_candidates_;
   PeerConnectionInterface::IceConnectionState ice_connection_state_;
   PeerConnectionInterface::IceGatheringState ice_gathering_state_;
   size_t num_candidates_removed_ = 0;
 };
@@ skipping 4191 matching lines @@
 }
 
 // TODO(bemasc): Add a TestIceStatesBundle with BUNDLE enabled.  That test
 // currently fails because upon disconnection and reconnection OnIceComplete is
 // called more than once without returning to IceGatheringGathering.
 
 INSTANTIATE_TEST_CASE_P(WebRtcSessionTests,
                         WebRtcSessionTest,
                         testing::Values(ALREADY_GENERATED,
                                         DTLS_IDENTITY_STORE));