[Autofill] Always show available data when encountering autocomplete attributes

components/autofill/core/browser/form_structure.cc

Index: components/autofill/core/browser/form_structure.cc
diff --git a/components/autofill/core/browser/form_structure.cc b/components/autofill/core/browser/form_structure.cc
index 164be8b2394476f68a56cbf5a3a30ced17176799..ff32790739422ac9fc2f11c950b99f59d0ede6cd 100644
--- a/components/autofill/core/browser/form_structure.cc
+++ b/components/autofill/core/browser/form_structure.cc
@@ -389,6 +389,8 @@ FormStructure::FormStructure(const FormData& form)
       active_field_count_(0),
       upload_required_(USE_UPLOAD_RATES),
       has_author_specified_types_(false),
+      has_author_specified_sections_(false),
+      was_parsed_for_autocomplete_attributes_(false),
       has_password_field_(false),
       is_form_tag_(form.is_form_tag) {
   // Copy the form fields.
@@ -423,9 +425,8 @@ void FormStructure::DetermineHeuristicTypes() {
   // attribute value.  If there is at least one form field that specifies an
   // autocomplete type hint, don't try to apply other heuristics to match fields
   // in this form.
-  bool has_author_specified_sections;
-  ParseFieldTypesFromAutocompleteAttributes(&has_author_specified_types_,
-                                            &has_author_specified_sections);
+  if (!was_parsed_for_autocomplete_attributes_)
+    ParseFieldTypesFromAutocompleteAttributes();
 
   if (!has_author_specified_types_) {
     ServerFieldTypeMap field_type_map;
@@ -440,7 +441,7 @@ void FormStructure::DetermineHeuristicTypes() {
   }
 
   UpdateAutofillCount();
-  IdentifySections(has_author_specified_sections);
+  IdentifySections(has_author_specified_sections_);
 
   if (IsAutofillable()) {
     AutofillMetrics::LogDeveloperEngagementMetric(
@@ -746,7 +747,8 @@ void FormStructure::UpdateAutofillCount() {
 }
 
 bool FormStructure::ShouldBeParsed() const {
-  if (active_field_count() < kRequiredAutofillFields)
+  if (active_field_count() < kRequiredAutofillFields &&
+      !has_author_specified_types_)
     return false;
 
   // Rule out http(s)://*/search?...
@@ -1082,13 +1084,11 @@ bool FormStructure::EncodeFormRequest(
   return true;
 }
 
-void FormStructure::ParseFieldTypesFromAutocompleteAttributes(
-    bool* found_types,
-    bool* found_sections) {
+void FormStructure::ParseFieldTypesFromAutocompleteAttributes() {
   const std::string kDefaultSection = "-default";
 
-  *found_types = false;
-  *found_sections = false;
+  has_author_specified_types_ = false;
+  has_author_specified_sections_ = false;
   for (std::vector<AutofillField*>::iterator it = fields_.begin();
        it != fields_.end(); ++it) {
     AutofillField* field = *it;
@@ -1122,7 +1122,7 @@ void FormStructure::ParseFieldTypesFromAutocompleteAttributes(
     // This allows a website's author to specify an attribute like
     // autocomplete="other" on a field to disable all Autofill heuristics for
     // the form.
-    *found_types = true;
+    has_author_specified_types_ = true;
 
     // Tokenize the attribute value.  Per the spec, the tokens are parsed in
     // reverse order.
@@ -1185,7 +1185,7 @@ void FormStructure::ParseFieldTypesFromAutocompleteAttributes(
       continue;
 
     if (section != kDefaultSection) {
-      *found_sections = true;
+      has_author_specified_sections_ = true;
       field->set_section(section);
     }
 
@@ -1193,6 +1193,8 @@ void FormStructure::ParseFieldTypesFromAutocompleteAttributes(
     // Update the |field|'s type based on what was parsed from the attribute.
     field->SetHtmlType(field_type, mode);
   }
+
+  was_parsed_for_autocomplete_attributes_ = true;
 }
 
 bool FormStructure::FillFields(