Rename requireUserMediation to preventSilentAccess in the CM API.

tools/metrics/histograms/enums.xml

Index: tools/metrics/histograms/enums.xml
diff --git a/tools/metrics/histograms/enums.xml b/tools/metrics/histograms/enums.xml
index bb6e895d2b846e96c3fbd250cc0d2a88e1df15c9..fd804d3e91dd4256f16ba6ae4f516cab5607e6e8 100644
--- a/tools/metrics/histograms/enums.xml
+++ b/tools/metrics/histograms/enums.xml
@@ -13946,7 +13946,7 @@ uploading your change for review.  These are checked by presubmit scripts.
   <int value="961" label="CredentialManagerGetMediationOptional"/>
   <int value="962" label="CredentialManagerGetMediationSilent"/>
   <int value="963" label="CredentialManagerStore"/>
-  <int value="964" label="CredentialManagerRequireUserMediation"/>
+  <int value="964" label="CredentialManagerPreventSilentAccess"/>
   <int value="965" label="RequestAutocomplete"/>
   <int value="966" label="BlockableMixedContentInSubframeBlocked"/>
   <int value="967" label="AddEventListenerThirdArgumentIsObject"/>
@@ -15008,6 +15008,7 @@ uploading your change for review.  These are checked by presubmit scripts.
   <int value="1991" label="ShapeDetection_BarcodeDetectorConstructor"/>
   <int value="1992" label="ShapeDetection_FaceDetectorConstructor"/>
   <int value="1993" label="ShapeDetection_TextDetectorConstructor"/>
+  <int value="1994" label="CredentialManagerRequireUserMediation"/>
 </enum>
 
 <enum name="FeedbackSource" type="int">