Introduce the PushSubscription.curve25519dh attribute (2/3)

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 9daef964fbafc3ad717b26212140a15dbc37e3fd..cb319b92efd487fe15047db273c48a3970bbfdf9 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -65682,6 +65682,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="2" label="Storage error"/>
   <int value="3" label="Registration not found"/>
   <int value="4" label="Registration not found (no incognito push service)"/>
+  <int value="5" label="Unable to retrieve the public key"/>
 </enum>
 
 <enum name="PushRegistrationStatus" type="int">
@@ -65696,6 +65697,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="8" label="Successful - from cache"/>
   <int value="9" label="Network error"/>
   <int value="10" label="Permission denied (no incognito push service)"/>
+  <int value="11" label="Unable to retrieve the public key"/>
 </enum>
 
 <enum name="PushUnregistrationStatus" type="int">