[Autofill] Add upstreaming UKM

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 60530d1d4d3e5fafa88a9623db742098c9a71c52..ff0eacd998380010cddf9f8fb26ddecc840f2194 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -98188,6 +98188,7 @@ from previous Chrome versions.
   <int value="-1510839574" label="disable-sync-synced-notifications"/>
   <int value="-1504305449" label="NTPPhysicalWebPageSuggestions:enabled"/>
   <int value="-1497338981" label="disable-accelerated-overflow-scroll"/>
+  <int value="-1493640756" label="AutofillLogUkm:disabled"/>
   <int value="-1491417046" label="enable-fullscreen-toolbar-reveal"/>
   <int value="-1490298774" label="enable-captive-portal-bypass-proxy-option"/>
   <int value="-1488744539" label="QuickUnlockFingerprint:enabled"/>
@@ -98654,6 +98655,7 @@ from previous Chrome versions.
   <int value="562979188" label="DesktopIOSPromotion:enabled"/>
   <int value="567368307" label="enable-experimental-canvas-features"/>
   <int value="575394365" label="AndroidPaymentApps:disabled"/>
+  <int value="580438598" label="AutofillLogUkm:enabled"/>
   <int value="581118445" label="enable-eol-notification"/>
   <int value="581355159" label="ContentSuggestionsCategoryRanker:disabled"/>
   <int value="584541349" label="ContextualSearchSingleActions:disabled"/>