Move Credentials when migrating to HSTS page

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 fb7ebd76f660639411317639e60ea3ab5f6dbf6b..935cf083f7925cfef6f01e11c3459b2f28e7ec88 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -46641,6 +46641,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="PasswordManager.HttpPasswordMigrationMode"
+    enum="HttpPasswordMigrationMode">
+  <owner>jdoerrie@chromium.org</owner>
+  <summary>
+    The mode of migration applied to HTTP passwords migrating to HTTPS. Recorded
+    on HTTPS password form load when there are no credentials saved.
+  </summary>
+</histogram>
+
 <histogram name="PasswordManager.ImportedPasswordsPerUserInCSV">
   <owner>xunlu@chromium.org</owner>
   <owner>vabr@chromium.org</owner>
@@ -96041,6 +96050,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="7" label="HEADER_HTTP_09_ON_REUSED_SOCKET"/>
 </enum>
 
+<enum name="HttpPasswordMigrationMode" type="int">
+  <int value="0" label="Moved">
+    HTTP credentials were moved during migration to HTTPS
+  </int>
+  <int value="1" label="Copied">
+    HTTP credentials were copied during migration to HTTPS
+  </int>
+</enum>
+
 <enum name="HttpPipelineStatus" type="int">
   <int value="0" label="Success"/>
   <int value="1" label="Redirected"/>