Revert of Enable -Winconsistent-missing-override flag.

webrtc/p2p/base/faketransportcontroller.h

Index: webrtc/p2p/base/faketransportcontroller.h
diff --git a/webrtc/p2p/base/faketransportcontroller.h b/webrtc/p2p/base/faketransportcontroller.h
index e2bdc1085e7513d2c4ba7ca7402c722bb5ab597d..c099c8cb796e1f132578a39631fe87670b3d434c 100644
--- a/webrtc/p2p/base/faketransportcontroller.h
+++ b/webrtc/p2p/base/faketransportcontroller.h
@@ -231,7 +231,7 @@
   }
 
   bool SetLocalCertificate(
-      const rtc::scoped_refptr<rtc::RTCCertificate>& certificate) override {
+      const rtc::scoped_refptr<rtc::RTCCertificate>& certificate) {
     local_cert_ = certificate;
     return true;
   }
@@ -257,7 +257,7 @@
 
   bool GetSslCipherSuite(int* cipher_suite) override { return false; }
 
-  rtc::scoped_refptr<rtc::RTCCertificate> GetLocalCertificate() const override {
+  rtc::scoped_refptr<rtc::RTCCertificate> GetLocalCertificate() const {
     return local_cert_;
   }