[autofill] Add UKM for field type prediction quality and autofill outcome.

tools/metrics/ukm/ukm.xml

Index: tools/metrics/ukm/ukm.xml
diff --git a/tools/metrics/ukm/ukm.xml b/tools/metrics/ukm/ukm.xml
index 662f9a84e458e940ec806fd214efdd1f372e2d6b..e920a98178df5078586d7e61b5e78414a4e6eec1 100644
--- a/tools/metrics/ukm/ukm.xml
+++ b/tools/metrics/ukm/ukm.xml
@@ -35,6 +35,94 @@ be describing additional metrics about the same event.
   <metric name="DeveloperEngagement"/>
 </event>
 
+<event name="Autofill.FieldFillStatus">
+  <owner>rogerm@google.com</owner>
+  <summary>
+    Recorded when Chrome validates field type predictions (on submit, on leaving

[rkaplow, 2017/06/19 17:03:28]

is this wrong?

[Roger McFarlane (Chromium), 2017/06/21 21:01:55]

No, but the constants used to refer to them are poorly named.

  AutofillMetrids::QualityMetricType::{
    TYPE_SUBMISSION,
    TYPE_NO_SUBMISSION,
    TYPE_AUTOCOMPLETE_BASED
  }

I plan to go back and rename these... but not in this CL; it's big enough
already.

+    a form, on receiving a form with autocomplete attributes).
+  </summary>
+  <metric name="FieldSignature">
+    <summary>
+      The signature of the field

[rkaplow, 2017/06/19 17:03:28]

.

(also can you give more details on what signatures are?)

[Roger McFarlane (Chromium), 2017/06/21 21:01:55]

Done.

+    </summary>
+  </metric>
+  <metric name="FormSignature">
+    <summary>
+      The signature of the form.
+    </summary>
+  </metric>
+  <metric name="IsAutofilled">
+    <summary>
+      The field is currently autofilled.
+    </summary>
+  </metric>
+  <metric name="MillisecondsSinceFormParsed">

[rkaplow, 2017/06/19 17:03:28]

prefer putting MS as a suffix

[Roger McFarlane (Chromium), 2017/06/21 21:01:55]

This string is used throughout the autofill UKM events. I'd prefer to be
consistent and either leave it as it, or change it everywhere.

As the UKMs are temporarily on hold, this might be a good opportunity for a
rename, but that would require this CL to be merged into M60... for which we're
a bit late.

+    <summary>
+      Time since form parse.
+    </summary>
+  </metric>
+  <metric name="PredictionSource">
+    <summary>
+      The system which generated the prediction: heuristics, server, overall.
+    </summary>
+  </metric>
+  <metric name="ValidationEvent">
+    <summary>
+      The event which triggered the validation: Submission, Left Form, Form has
+      Autocomplete attributes.
+    </summary>
+  </metric>
+  <metric name="WasPreviouslyAutofilled">
+    <summary>
+      The field was autofilled and subsequently edited.
+    </summary>
+  </metric>
+</event>
+
+<event name="Autofill.FieldTypeValidation">
+  <owner>rogerm@google.com</owner>
+  <summary>
+    Recorded when Chrome validates field type predictions (on submit, on leaving
+    a form, on receiving a form with autocomplete attributes).
+  </summary>
+  <metric name="ActualType">
+    <summary>
+      The observed type of the field. See: autofill::ServerFieldType
+    </summary>
+  </metric>
+  <metric name="FieldSignature">

[rkaplow, 2017/06/19 17:03:28]

similar comments

[Roger McFarlane (Chromium), 2017/06/21 21:01:55]

Done.

+    <summary>
+      The signature of the field
+    </summary>
+  </metric>
+  <metric name="FormSignature">
+    <summary>
+      The signature of the form.
+    </summary>
+  </metric>
+  <metric name="MillisecondsSinceFormParsed">
+    <summary>
+      Time since form parse.
+    </summary>
+  </metric>
+  <metric name="PredictedType">
+    <summary>
+      The predicted type of the field. See: autofill::ServerFieldType
+    </summary>
+  </metric>
+  <metric name="PredictionSource">
+    <summary>
+      The system which generated the prediction: heuristics, server, overall.
+    </summary>
+  </metric>
+  <metric name="ValidationEvent">
+    <summary>
+      The event which triggered the validation: Submission, Left Form, Form has
+      Autocomplete attributes.
+    </summary>
+  </metric>
+</event>
+
 <event name="Autofill.FormSubmitted">
   <owner>jiahuiguo@google.com</owner>
   <summary>