Reland: Cache protected password entry and password on focus ping separately.

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 f3310ae980f2d4175e6d6fbb70a9ef1a33b0d6ab..48345b9d8b93d59085df2dcd9183d47996bbcb55 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -51480,8 +51480,8 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
-<histogram name="PasswordProtection.NumberOfCachedVerdictBeforeShutdown"
-    units="count">
+<histogram base="true"
+    name="PasswordProtection.NumberOfCachedVerdictBeforeShutdown" units="count">
   <owner>jialiul@chromium.org</owner>
   <owner>nparker@chromium.org</owner>
   <summary>
@@ -92765,6 +92765,8 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram_suffixes>
 
 <histogram_suffixes name="PasswordProtectionTrigger" separator=".">
+  <affected-histogram
+      name="PasswordProtection.NumberOfCachedVerdictBeforeShutdown"/>
   <suffix name="PasswordFieldOnFocus"
       label="Password protection triggered by password field on focus event."/>
   <suffix name="ProtectedPasswordEntry"