Add flag to enable/disable affiliaton based matching.

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 2309a4abe4dc9104531674aa4cc9692facfb7595..d40212b84c33feadb019c4d43ee202abb815b267 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -50872,6 +50872,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="-158549277" label="enable-embeddedsearch-api"/>
   <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="-102537270" label="extension-content-verification"/>
   <int value="-99781021" label="disable-roboto-font-ui"/>
   <int value="-88822940" label="ssl-version-min"/>
@@ -50889,6 +50890,7 @@ To add a new entry, add it with any value and run test to compute valid value.
     Command-line flag doesn't start with two dashes.
   </int>
   <int value="27507364" label="apps-keep-chrome-alive"/>
+  <int value="37024318" label="disable-affiliation-based-matching"/>
   <int value="48159177" label="reduced-referrer-granularity"/>
   <int value="61205887" label="enable-text-input-focus-manager"/>
   <int value="79503461" label="disable-account-consistency"/>