MD Settings: fix appearance of managed metrics reporting checkbox

chrome/browser/resources/settings/privacy_page/privacy_page.html

Index: chrome/browser/resources/settings/privacy_page/privacy_page.html
diff --git a/chrome/browser/resources/settings/privacy_page/privacy_page.html b/chrome/browser/resources/settings/privacy_page/privacy_page.html
index 28792dc7750dccc8b92ba760d9377349e19c5f6a..a0afaa314d8083bd538f468590192919d16f065c 100644
--- a/chrome/browser/resources/settings/privacy_page/privacy_page.html
+++ b/chrome/browser/resources/settings/privacy_page/privacy_page.html
@@ -49,6 +49,10 @@
       #metricsReportingCheckbox,
       #safeBrowsingExtendedReportingCheckbox {
         display: inline-block;
+      }
+
+      #metricsReportingCheckbox:not([disabled]),
+      #safeBrowsingExtendedReportingCheckbox {
         width: 100%;
       }