Revert of Enable -Winconsistent-missing-override flag.

webrtc/modules/audio_coding/neteq/test/neteq_opus_quality_test.cc

 /*
  *  Copyright (c) 2014 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 85 matching lines @@
 static const bool sub_packets_dummy =
     RegisterFlagValidator(&FLAGS_sub_packets, &ValidateSubPackets);
 
 }  // namepsace
 
 class NetEqOpusQualityTest : public NetEqQualityTest {
  protected:
   NetEqOpusQualityTest();
   void SetUp() override;
   void TearDown() override;
-  int EncodeBlock(int16_t* in_data, size_t block_size_samples,
-                  rtc::Buffer* payload, size_t max_bytes) override;
+  virtual int EncodeBlock(int16_t* in_data, size_t block_size_samples,
+                          rtc::Buffer* payload, size_t max_bytes);
  private:
   WebRtcOpusEncInst* opus_encoder_;
   OpusRepacketizer* repacketizer_;
   size_t sub_block_size_samples_;
   int bit_rate_kbps_;
   bool fec_;
   bool dtx_;
   int complexity_;
   int maxplaybackrate_;
   int target_loss_rate_;
@@ skipping 88 matching lines @@
   EXPECT_GE(value, 0);
   return value;
 }
 
 TEST_F(NetEqOpusQualityTest, Test) {
   Simulate();
 }
 
 }  // namespace test
 }  // namespace webrtc