Revert of Enable -Winconsistent-missing-override flag.

webrtc/api/test/fakeaudiocapturemodule.h

Index: webrtc/api/test/fakeaudiocapturemodule.h
diff --git a/webrtc/api/test/fakeaudiocapturemodule.h b/webrtc/api/test/fakeaudiocapturemodule.h
index 098243f1c65caadbeecacfa98dbf2c6856b99987..30ad3f8b71feaca1b42234b11bcdc3bd4c989984 100644
--- a/webrtc/api/test/fakeaudiocapturemodule.h
+++ b/webrtc/api/test/fakeaudiocapturemodule.h
@@ -174,12 +174,12 @@
   int32_t ResetAudioDevice() override;
   int32_t SetLoudspeakerStatus(bool enable) override;
   int32_t GetLoudspeakerStatus(bool* enabled) const override;
-  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; }
+  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; }
   // End of functions inherited from webrtc::AudioDeviceModule.
 
   // The following function is inherited from rtc::MessageHandler.