Enable trendline experiment and bayesian bitrate estimator experiment by default.

webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h

Index: webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h
diff --git a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h
index a9d68066b558b5b063fcf008c9baf6edb59f8994..85430b78e734511809b8147f4a19c79a2afa0ab9 100644
--- a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h
+++ b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h
@@ -17,23 +17,11 @@ RTC_EXTERN NSString * const kRTCFieldTrialAudioSendSideBweKey;
 RTC_EXTERN NSString * const kRTCFieldTrialSendSideBweWithOverheadKey;
 RTC_EXTERN NSString * const kRTCFieldTrialFlexFec03AdvertisedKey;
 RTC_EXTERN NSString * const kRTCFieldTrialFlexFec03Key;
-RTC_EXTERN NSString * const kRTCFieldTrialImprovedBitrateEstimateKey;
 RTC_EXTERN NSString * const kRTCFieldTrialH264HighProfileKey;
 
 /** The valid value for field trials above. */
 RTC_EXTERN NSString * const kRTCFieldTrialEnabledValue;
 
-/** Use a string returned by RTCFieldTrialMedianSlopeFilterValue as the value. */
-RTC_EXTERN NSString * const kRTCFieldTrialMedianSlopeFilterKey;
-RTC_EXTERN NSString *RTCFieldTrialMedianSlopeFilterValue(
-    size_t windowSize, double thresholdGain);
-
-/** Use a string returned by RTCFieldTrialTrendlineFilterValue as the value. */
-RTC_EXTERN NSString * const kRTCFieldTrialTrendlineFilterKey;
-/** Returns a valid value for kRTCFieldTrialTrendlineFilterKey. */
-RTC_EXTERN NSString *RTCFieldTrialTrendlineFilterValue(
-    size_t windowSize, double smoothingCoeff, double thresholdGain);
-
 /** Initialize field trials using a dictionary mapping field trial keys to their values. See above
  *  for valid keys and values.
  *  Must be called before any other call into WebRTC. See: