Add some basic success/failure UMA logging for autofill.

chrome/browser/autofill/form_structure.h

Index: chrome/browser/autofill/form_structure.h
diff --git a/chrome/browser/autofill/form_structure.h b/chrome/browser/autofill/form_structure.h
index fe4c5dadee127b09f39eeae73eea8e7db0563a69..3236f375c562a7c5cd11079e262efeb827dc0340 100644
--- a/chrome/browser/autofill/form_structure.h
+++ b/chrome/browser/autofill/form_structure.h
@@ -11,6 +11,7 @@
 
 #include "base/scoped_vector.h"
 #include "chrome/browser/autofill/autofill_field.h"
+#include "chrome/browser/autofill/autofill_metrics.h"
 #include "chrome/browser/autofill/autofill_type.h"
 #include "chrome/browser/autofill/field_types.h"
 #include "googleurl/src/gurl.h"
@@ -53,9 +54,11 @@ class FormStructure {
 
   // Parses the field types from the server query response. |forms| must be the
   // same as the one passed to EncodeQueryRequest when constructing the query.
-  static void ParseQueryResponse(const std::string& response_xml,
-                                 const std::vector<FormStructure*>& forms,
-                                 UploadRequired* upload_required);
+  static void ParseQueryResponse(
+      const std::string& response_xml,
+      const std::vector<FormStructure*>& forms,
+      UploadRequired* upload_required,
+      autofill_metrics::LogServerQueryMetricFn log_server_query_metric);
 
   // The unique signature for this form, composed of the target url domain,
   // the form name, and the form field names in a 64-bit hash.