Enable -Winconsistent-missing-override flag.

webrtc/api/test/fakeaudiocapturemodule.h

 /*
  *  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 156 matching lines @@
   int32_t StopRawInputFileRecording() override;
 
   int32_t SetRecordingSampleRate(const uint32_t samples_per_sec) override;
   int32_t RecordingSampleRate(uint32_t* samples_per_sec) const override;
   int32_t SetPlayoutSampleRate(const uint32_t samples_per_sec) override;
   int32_t PlayoutSampleRate(uint32_t* samples_per_sec) const override;
 
   int32_t ResetAudioDevice() override;
   int32_t SetLoudspeakerStatus(bool enable) override;
   int32_t GetLoudspeakerStatus(bool* enabled) const override;
-  virtual bool BuiltInAECIsAvailable() const { return false; }
-  virtual int32_t EnableBuiltInAEC(bool enable) { return -1; }
-  virtual bool BuiltInAGCIsAvailable() const { return false; }
-  virtual int32_t EnableBuiltInAGC(bool enable) { return -1; }
-  virtual bool BuiltInNSIsAvailable() const { return false; }
-  virtual int32_t EnableBuiltInNS(bool enable) { return -1; }
+  bool BuiltInAECIsAvailable() const override { return false; }
+  int32_t EnableBuiltInAEC(bool enable) override { return -1; }
+  bool BuiltInAGCIsAvailable() const override { return false; }
+  int32_t EnableBuiltInAGC(bool enable) override { return -1; }
+  bool BuiltInNSIsAvailable() const override { return false; }
+  int32_t EnableBuiltInNS(bool enable) override { return -1; }
   // End of functions inherited from webrtc::AudioDeviceModule.
 
   // The following function is inherited from rtc::MessageHandler.
   void OnMessage(rtc::Message* msg) override;
 
  protected:
   // The constructor is protected because the class needs to be created as a
   // reference counted object (for memory managment reasons). It could be
   // exposed in which case the burden of proper instantiation would be put on
   // the creator of a FakeAudioCaptureModule instance. To create an instance of
@@ skipping 70 matching lines @@
 
   // Protects variables that are accessed from process_thread_ and
   // the main thread.
   rtc::CriticalSection crit_;
   // Protects |audio_callback_| that is accessed from process_thread_ and
   // the main thread.
   rtc::CriticalSection crit_callback_;
 };
 
 #endif  // WEBRTC_API_TEST_FAKEAUDIOCAPTUREMODULE_H_