Bug 1897501 - Vendor libwebrtc from d5c107d5d4

Upstream commit: https://webrtc.googlesource.com/src/+/d5c107d5d4d5091adaab43b0ee9f635b5311b4b1
    Remove expired WebRTC-Bwe-SubtractAdditionalBackoffTerm

    Bug: webrtc:13402
    Change-Id: Ia5a741fb7af753fbcbf00ece4f8e321c9b2655a2
    Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/345721
    Reviewed-by: Björn Terelius <tereliuswebrtc.org>
    Commit-Queue: Emil Lundmark <lndmrkwebrtc.org>
    Cr-Commit-Position: refs/heads/main{#42028}

UltraBlame original commit: c0a57fd27b4e2ca0d707412e061eb6f28dde9daa

third_party/libwebrtc/README.moz-ff-commit

@@ -465005,3 +465005,52 @@ of
 lastest
 vendoring
 91b1cfbfa0
+#
+MOZ_LIBWEBRTC_SRC
+=
+/
+home
+/
+mfroman
+/
+mozilla
+/
+moz
+-
+central
+/
+.
+moz
+-
+fast
+-
+forward
+/
+moz
+-
+libwebrtc
+MOZ_LIBWEBRTC_BRANCH
+=
+mozpatches
+bash
+dom
+/
+media
+/
+webrtc
+/
+third_party_build
+/
+fast
+-
+forward
+-
+libwebrtc
+.
+sh
+#
+base
+of
+lastest
+vendoring
+d5c107d5d4

third_party/libwebrtc/README.mozilla

@@ -769024,3 +769024,91 @@ on
 .
 709538
 .
+#
+.
+/
+mach
+python
+dom
+/
+media
+/
+webrtc
+/
+third_party_build
+/
+vendor
+-
+libwebrtc
+.
+py
+-
+-
+from
+-
+local
+/
+home
+/
+mfroman
+/
+mozilla
+/
+moz
+-
+central
+/
+.
+moz
+-
+fast
+-
+forward
+/
+moz
+-
+libwebrtc
+-
+-
+commit
+mozpatches
+libwebrtc
+libwebrtc
+updated
+from
+/
+home
+/
+mfroman
+/
+mozilla
+/
+moz
+-
+central
+/
+.
+moz
+-
+fast
+-
+forward
+/
+moz
+-
+libwebrtc
+commit
+mozpatches
+on
+2024
+-
+05
+-
+18T03
+:
+41
+:
+16
+.
+602951
+.

third_party/libwebrtc/experiments/field_trials.py

@@ -244,30 +244,6 @@
 )
 )
 
-FieldTrial
-(
-'
-WebRTC
--
-Bwe
--
-SubtractAdditionalBackoffTerm
-'
-
-'
-webrtc
-:
-13402
-'
-
-date
-(
-2024
-4
-1
-)
-)
-
 FieldTrial
 (
 '

third_party/libwebrtc/modules/remote_bitrate_estimator/aimd_rate_control.cc

@@ -457,22 +457,6 @@ DontIncreaseDelayBasedBweInAlr
 "
 )
 )
-subtract_additional_backoff_term_
-(
-!
-key_value_config
-.
-IsDisabled
-(
-"
-WebRTC
--
-Bwe
--
-SubtractAdditionalBackoffTerm
-"
-)
-)
 {
 ParseFieldTrial
 (
@@ -1455,9 +1439,6 @@ KilobitsPerSec
 (
 5
 )
-&
-&
-subtract_additional_backoff_term_
 )
 {
 decreased_bitrate

third_party/libwebrtc/modules/remote_bitrate_estimator/aimd_rate_control.h

@@ -374,10 +374,6 @@ const
 bool
 no_bitrate_increase_in_alr_
 ;
-const
-bool
-subtract_additional_backoff_term_
-;
 FieldTrialFlag
 disable_estimate_bounded_increase_
 {