Add HTTP-specific metrics for password forms

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 2500cffc3b898f347991816f3f717ccd8f31a748..b97cf5a9720b7495e16e28f735db078fa08ecf38 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -44557,6 +44557,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="PasswordManager.ActionsTakenOnNonSecureForm"
+    enum="PasswordManagerActionsTakenV3">
+  <owner>estark@chromium.org</owner>
+  <summary>
+    Stats documenting how we handle every form containing a password on a
+    non-secure page, bucketed by the actions taken.
+  </summary>
+</histogram>
+
 <histogram name="PasswordManager.ActionsTakenV3"
     enum="PasswordManagerActionsTakenV3">
   <owner>vabr@chromium.org</owner>
@@ -45255,6 +45264,16 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="PasswordManager.SubmittedNonSecureFormType"
+    enum="PasswordFormType">
+  <owner>estark@chromium.org</owner>
+  <summary>
+    The type (e.g. signup, login, change password) of all submitted password
+    forms on non-secure pages. This is logged on form submission, but doesn't
+    require that the password manager saves.
+  </summary>
+</histogram>
+
 <histogram name="PasswordManager.SyncCredentialFiltered"
     enum="CredentialFilteredType">
   <owner>gcasto@chromium.org</owner>