Add Browser Task Scheduler Flags

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 119cf81f6a1e116d78ce7ecfa12082329e372c13..5bbee6c6d69bf3c58e96e3d1ebb94e07fd9180ef 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -83084,6 +83084,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="-474322576" label="disable-quick-unlock-pin"/>
   <int value="-462205750" label="enable-service-worker-sync"/>
   <int value="-455203267" label="use_new_features_summary"/>
+  <int value="-449465495" label="disable-browser-task-scheduler"/>
   <int value="-430360431" label="disable-password-generation"/>
   <int value="-418868128" label="enable-experimental-web-platform-features"/>
   <int value="-396994784" label="enable-vr-shell"/>
@@ -83124,6 +83125,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="-158197254" label="enable-credential-manager-api"/>
   <int value="-147283486" label="enable-network-portal-notification"/>
   <int value="-146552997" label="enable-affiliation-based-matching"/>
+  <int value="-122492389" label="enable-browser-task-scheduler"/>
   <int value="-102537270" label="extension-content-verification"/>
   <int value="-99781021" label="disable-roboto-font-ui"/>
   <int value="-88822940" label="ssl-version-min"/>