Bug 1860685 - Vendor libwebrtc from 0fa90c3878

Upstream commit: https://webrtc.googlesource.com/src/+/0fa90c387838b2c2b53067d2e51fcbf3fd78980c
    Reland "Per default enable RobustThroughputEstimator"

    This reverts commit 4ef01d41b73c1543abf1096e64406ae5233d0230.

    Reason for revert: Downstream projects fixed

    Original change's description:
    > Revert "Per default enable RobustThroughputEstimator"
    >
    > This reverts commit d017b1e306186252ed52ab84459d05efc4eb9fd4.
    >
    > Reason for revert: Breaks downstream test.
    >
    > Original change's description:
    > > Per default enable RobustThroughputEstimator
    > >
    > > Experiments has not showed significant metric changes. However, simulations has showed that RobustThroughputEstimator better follow the actually receive rate better. Especially during bursts of sent packets. Code is also simpler.
    > >
    > >
    > > Bug: webrtc:13402 chromium:1411666
    > > Change-Id: I38c309f74e8e1322602196354545b3a465866263
    > > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/318040
    > > Reviewed-by: Björn Terelius <terelius@webrtc.org>
    > > Commit-Queue: Per Kjellander <perkj@webrtc.org>
    > > Cr-Commit-Position: refs/heads/main@{#40653}
    >
    > Bug: webrtc:13402 chromium:1411666 b/298001595
    > Change-Id: Ic68ef954f462021e991f3183b94d85eb6a44fac0
    > No-Presubmit: true
    > No-Tree-Checks: true
    > No-Try: true
    > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/318141
    > Owners-Override: Mirko Bonadei <mbonadei@webrtc.org>
    > Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
    > Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
    > Cr-Commit-Position: refs/heads/main@{#40658}

    Bug: webrtc:13402 chromium:1411666 b/298001595
    Change-Id: I73f0e9b0e2f209b3833b38241e96ef8f7b3f1e5f
    Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/318282
    Commit-Queue: Per Kjellander <perkj@webrtc.org>
    Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
    Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
    Cr-Commit-Position: refs/heads/main@{#40664}

third_party/libwebrtc/README.moz-ff-commit

@@ -25698,3 +25698,6 @@ d23d450a50
 # MOZ_LIBWEBRTC_SRC=/home/bcampen/checkouts/elm/.moz-fast-forward/moz-libwebrtc MOZ_LIBWEBRTC_BRANCH=mozpatches bash dom/media/webrtc/third_party_build/fast-forward-libwebrtc.sh
 # base of lastest vendoring
 675ef918a8
+# MOZ_LIBWEBRTC_SRC=/home/bcampen/checkouts/elm/.moz-fast-forward/moz-libwebrtc MOZ_LIBWEBRTC_BRANCH=mozpatches bash dom/media/webrtc/third_party_build/fast-forward-libwebrtc.sh
+# base of lastest vendoring
+0fa90c3878

third_party/libwebrtc/README.mozilla

@@ -17156,3 +17156,5 @@ libwebrtc updated from /home/bcampen/checkouts/elm/.moz-fast-forward/moz-libwebr
 libwebrtc updated from /home/bcampen/checkouts/elm/.moz-fast-forward/moz-libwebrtc commit mozpatches on 2023-10-27T20:24:38.532274.
 # ./mach python dom/media/webrtc/third_party_build/vendor-libwebrtc.py --from-local /home/bcampen/checkouts/elm/.moz-fast-forward/moz-libwebrtc --commit mozpatches libwebrtc
 libwebrtc updated from /home/bcampen/checkouts/elm/.moz-fast-forward/moz-libwebrtc commit mozpatches on 2023-10-27T20:25:53.704517.
+# ./mach python dom/media/webrtc/third_party_build/vendor-libwebrtc.py --from-local /home/bcampen/checkouts/elm/.moz-fast-forward/moz-libwebrtc --commit mozpatches libwebrtc
+libwebrtc updated from /home/bcampen/checkouts/elm/.moz-fast-forward/moz-libwebrtc commit mozpatches on 2023-10-27T20:26:42.345111.

third_party/libwebrtc/modules/congestion_controller/goog_cc/acknowledged_bitrate_estimator_interface.h

@@ -33,7 +33,9 @@ struct RobustThroughputEstimatorSettings {
   explicit RobustThroughputEstimatorSettings(
       const FieldTrialsView* key_value_config);
 
-  bool enabled = false;  // Set to true to use RobustThroughputEstimator.
+  // Set `enabled` to true to use the RobustThroughputEstimator, false to use
+  // the AcknowledgedBitrateEstimator.
+  bool enabled = true;
 
   // The estimator keeps the smallest window containing at least
   // `window_packets` and at least the packets received during the last

third_party/libwebrtc/modules/congestion_controller/goog_cc/robust_throughput_estimator_unittest.cc

@@ -63,6 +63,19 @@ class FeedbackGenerator {
   uint16_t sequence_number_ = 100;
 };
 
+TEST(RobustThroughputEstimatorTest, DefaultEnabled) {
+  RobustThroughputEstimatorSettings settings =
+      CreateRobustThroughputEstimatorSettings("");
+  EXPECT_TRUE(settings.enabled);
+}
+
+TEST(RobustThroughputEstimatorTest, CanDisable) {
+  RobustThroughputEstimatorSettings settings =
+      CreateRobustThroughputEstimatorSettings(
+          "WebRTC-Bwe-RobustThroughputEstimatorSettings/enabled:false/");
+  EXPECT_FALSE(settings.enabled);
+}
+
 TEST(RobustThroughputEstimatorTest, InitialEstimate) {
   FeedbackGenerator feedback_generator;
   RobustThroughputEstimator throughput_estimator(