Add some basic success/failure UMA logging for autofill.

chrome/browser/autofill/form_structure.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_AUTOFILL_FORM_STRUCTURE_H_
 #define CHROME_BROWSER_AUTOFILL_FORM_STRUCTURE_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 13 matching lines @@
   GET,
   POST
 };
 
 enum UploadRequired {
   UPLOAD_NOT_REQUIRED,
   UPLOAD_REQUIRED,
   USE_UPLOAD_RATES
 };
 
+class AutoFillMetrics;
+
 // FormStructure stores a single HTML form together with the values entered
 // in the fields along with additional information needed by AutoFill.
 class FormStructure {
  public:
   explicit FormStructure(const webkit_glue::FormData& form);
   ~FormStructure();
 
   // Encodes the XML upload request from this FormStructure.
   bool EncodeUploadRequest(bool auto_fill_used,
                            std::string* encoded_xml) const;
 
   // Encodes the XML query request for the set of forms.
   // All fields are returned in one XML. For example, there are three forms,
   // with 2, 4, and 3 fields. The returned XML would have type info for 9
   // fields, first two of which would be for the first form, next 4 for the
   // second, and the rest is for the third.
   static bool EncodeQueryRequest(const ScopedVector<FormStructure>& forms,
                                  std::vector<std::string>* encoded_signatures,
                                  std::string* encoded_xml);
 
   // 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);
+                                 UploadRequired* upload_required,
+                                 const AutoFillMetrics& metric_logger);
 
   // 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.
   std::string FormSignature() const;
 
   // Runs a quick heuristic to rule out forms that are obviously not
   // auto-fillable, like google/yahoo/msn search, etc. The requirement that the
   // form's method be POST is only applied if |require_method_post| is true.
   bool IsAutoFillable(bool require_method_post) const;
 
@@ skipping 77 matching lines @@
   // character. E.g.: "&form_input1_name&form_input2_name&...&form_inputN_name"
   std::string form_signature_field_names_;
 
   // GET or POST.
   RequestMethod method_;
 
   DISALLOW_COPY_AND_ASSIGN(FormStructure);
 };
 
 #endif  // CHROME_BROWSER_AUTOFILL_FORM_STRUCTURE_H_