[Password Manager] Add UMA signals to understand how often the password form submit navigate…

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 ff7ec73fdb65f40c818644c0ae211d953902bf28..94b411d3d8f87152865d58283eba5f562c389545 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -23098,6 +23098,15 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="PasswordManager.SubmitNavigatesToDifferentDomain"
+    enum="PostSubmitNavigation">
+  <owner>vabr@chromium.org</owner>
+  <summary>
+    Indicates whether submitting a password login form changes the registry
+    controlled domain of the main frame.
+  </summary>
+</histogram>
+
 <histogram name="PasswordManager.SyncCredentialFiltered" enum="Boolean">
   <owner>gcasto@chromium.org</owner>
   <owner>vabr@chromium.org</owner>
@@ -53298,6 +53307,11 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="7" label="Overflow"/>
 </enum>
 
+<enum name="PostSubmitNavigation" type="int">
+  <int value="0" label="Same domain"/>
+  <int value="1" label="Different domain"/>
+</enum>
+
 <enum name="PowerBrightnessAdjust" type="int">
   <int value="0" label="Brightness Down"/>
   <int value="1" label="Brightness Up"/>