[Password Manager] Add UMA stats for submitted form type

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 500c47d0ae272e6042d4d995f4d05deca146b85c..fed58b63ca318674932c9d5987858d85a132a812 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -24821,6 +24821,15 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="PasswordManager.SubmittedFormType" enum="PasswordFormType">
+  <owner>gcasto@chromium.org</owner>
+  <owner>vabr@chromium.org</owner>
+  <summary>
+    The type  (e.g. signup, login, change password) of all submitted password

[vabr (Chromium), 2015/03/31 10:08:18]

nit: two spaces after "type" -- intentional?

[Garrett Casto, 2015/04/01 22:34:48]

Nope, fixed.

+    forms.
+  </summary>
+</histogram>
+
 <histogram name="PasswordManager.SyncCredentialFiltered" enum="Boolean">
   <owner>gcasto@chromium.org</owner>
   <owner>vabr@chromium.org</owner>
@@ -56244,6 +56253,19 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="6" label="Opened automatically / Auto-signin toast"/>
 </enum>
 
+<enum name="PasswordFormType" type="int">
+  <int value="0" label="Login form"/>
+  <int value="1" label="Login form without username"/>
+  <int value="2"
+      label="Enabled change password form (saved credentials match username)"/>
+  <int value="3"
+      label="Disabled change password form (no matching credentials)"/>
+  <int value="4" label="Disabled change password form without username"/>
+  <int value="5" label="Signup form"/>
+  <int value="6" label="Signup form without username"/>
+  <int value="7" label="Combined login and signup form"/>
+</enum>
+
 <enum name="PasswordGenerationEvent" type="int">
   <int value="0" label="No sign up form"/>
   <int value="1" label="Local heuristics found sign up form"/>