[Autofill] Add a new metric for upstream.

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 d3adda5eaa01c43f7fbe153647ee9ebcf6c1fb70..a3a985fd492c415825eb5cd0edee887e6ae27b2a 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -76572,25 +76572,27 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="6" label="Local suggestion filled (once)"/>
   <int value="7" label="Server suggestion filled (once)"/>
   <int value="8" label="Masked server card suggestion filled (once)"/>
-  <int value="9" label="Submitted with no suggestion filled (once)"/>

[Walter Cacau, 2016/12/15 23:04:23]

do not change the ids, IIRC they are actually what gets stored and it will mess
up the UMA graphs

treat it like proto tag/field ids

[Shanfeng, 2016/12/15 23:29:40]

Done.

-  <int value="10" label="Submitted with local suggestion filled (once)"/>
-  <int value="11" label="Submitted with server suggestion filled (once)"/>
-  <int value="12"
+  <int value="9" label="Submitted with suggestion shown (once)"/>
+  <int value="10" label="Submitted with no suggestion filled (once)"/>
+  <int value="11" label="Submitted with local suggestion filled (once)"/>
+  <int value="12" label="Submitted with server suggestion filled (once)"/>
+  <int value="13"
       label="Submitted with masked server card suggestion filled (once)"/>
-  <int value="13" label="Masked server card suggestion selected">
+  <int value="14" label="Masked server card suggestion selected">
     The user selected a masked server card that triggered an unmask attempt.
   </int>
-  <int value="14" label="Masked server card suggestion selected (once)">
+  <int value="15" label="Masked server card suggestion selected (once)">
     The user selected a masked server card that triggered an unmask attempt at
     least once.
   </int>
-  <int value="15"
+  <int value="16" label="About to be submitted with suggestion shown (once)"/>
+  <int value="17"
       label="About to be submitted with no suggestion filled (once)"/>
-  <int value="16"
+  <int value="18"
       label="About to be submitted with local suggestion filled (once)"/>
-  <int value="17"
+  <int value="19"
       label="About to be submitted with server suggestion filled (once)"/>
-  <int value="18"
+  <int value="20"
       label="About to be submitted with masked server card suggestion filled
              (once)"/>
 </enum>