Revert of 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 85430b78e734511809b8147f4a19c79a2afa0ab9..a9d68066b558b5b063fcf008c9baf6edb59f8994 100644
--- a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h
+++ b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCFieldTrials.h
@@ -17,10 +17,22 @@
 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.