[Password Manager] Add UMA stats for custom passphrase users.

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 93a74fe2f35e62d5a89baad65a5a84c7d4703941..60d557ffd74120b01639a885a3c4ad105dd23d31 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -22048,7 +22048,7 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 </histogram>
 
 <histogram name="PasswordManager.AccountsPerSite">
-  <owner>dubroy@chromium.org</owner>
+  <owner>gcasto@chromium.org</owner>
   <owner>vabr@chromium.org</owner>
   <summary>
     The number of accounts stored per site in the password manager (one event
@@ -22095,7 +22095,7 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 </histogram>
 
 <histogram name="PasswordManager.BlacklistedSites">
-  <owner>dubroy@chromium.org</owner>
+  <owner>gcasto@chromium.org</owner>
   <owner>vabr@chromium.org</owner>
   <summary>
     The total number of sites that the user has blacklisted. Recorded by
@@ -22238,7 +22238,7 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 </histogram>
 
 <histogram name="PasswordManager.TimesGeneratedPasswordUsed">
-  <owner>dubroy@chromium.org</owner>
+  <owner>gcasto@chromium.org</owner>
   <owner>vabr@chromium.org</owner>
   <summary>
     The number of times each generated password has been used to log in.
@@ -22248,7 +22248,7 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 </histogram>
 
 <histogram name="PasswordManager.TimesPasswordUsed">
-  <owner>dubroy@chromium.org</owner>
+  <owner>gcasto@chromium.org</owner>
   <owner>vabr@chromium.org</owner>
   <summary>
     The number of times each saved password has been used to log in. Does not
@@ -22258,7 +22258,7 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 </histogram>
 
 <histogram name="PasswordManager.TotalAccounts">
-  <owner>dubroy@chromium.org</owner>
+  <owner>gcasto@chromium.org</owner>
   <owner>vabr@chromium.org</owner>
   <summary>
     The number of accounts stored in the password manager (across all sites)
@@ -56714,6 +56714,16 @@ To add a new entry, add it with any value and run test to compute valid value.
   <affected-histogram name="Renderer4.BeginToFinishDoc"/>
 </histogram_suffixes>
 
+<histogram_suffixes name="PasswordCustomPassphrase" separator=".">
+  <suffix name="WithCustomPassphrase"/>
+  <suffix name="WithoutCustomPassphrase"/>
+  <affected-histogram name="PasswordManager.AccountsPerSite"/>
+  <affected-histogram name="PasswordManager.BlacklistedSites"/>
+  <affected-histogram name="PasswordManager.TimesGeneratedPasswordUsed"/>
+  <affected-histogram name="PasswordManager.TimesPasswordUsed"/>
+  <affected-histogram name="PasswordManager.TotalAccounts"/>
+</histogram_suffixes>
+
 <histogram_suffixes name="PasswordManagerMonitor">
   <suffix name="group_1" label="group 1"/>
   <suffix name="group_2" label="group 2"/>