[Autofill/Autocomplete Feature] Substring matching instead of prefix matching.

components/autofill/core/browser/personal_data_manager.cc

 // Copyright 2013 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.
 
 #include "components/autofill/core/browser/personal_data_manager.h"
 
 #include <algorithm>
 #include <functional>
 #include <iterator>
 
@@ skipping 782 matching lines @@
     base::string16 value = GetInfoInOneLine(profile, type, app_locale_);
     if (value.empty())
       continue;
     base::string16 value_canon =
         AutofillProfile::CanonicalizeProfileString(value);
     if (base::StartsWith(value_canon, field_contents_canon, true)) {
       // Prefix match, add suggestion.
       matched_profiles.push_back(profile);
       suggestions.push_back(Suggestion(value));
       suggestions.back().backend_id = profile->guid();
+      suggestions.back().match_start = field_contents.size();
     }
   }
 
   // Don't show two suggestions if one is a subset of the other.
   std::vector<AutofillProfile*> unique_matched_profiles;
   std::vector<Suggestion> unique_suggestions;
   ServerFieldTypeSet types(other_field_types.begin(), other_field_types.end());
   for (size_t i = 0; i < matched_profiles.size(); ++i) {
     bool include = true;
     AutofillProfile* profile_a = matched_profiles[i];
@@ skipping 96 matching lines @@
 
   std::vector<Suggestion> suggestions;
   for (const CreditCard* credit_card : cards_to_suggest) {
     // Make a new suggestion.
     suggestions.push_back(Suggestion());
     Suggestion* suggestion = &suggestions.back();
 
     suggestion->value = credit_card->GetInfo(type, app_locale_);
     suggestion->icon = base::UTF8ToUTF16(credit_card->type());
     suggestion->backend_id = credit_card->guid();
+    suggestion->match_start = field_contents.size();
 
     // If the value is the card number, the label is the expiration date.
     // Otherwise the label is the card number, or if that is empty the
     // cardholder name. The label should never repeat the value.
     if (type.GetStorableType() == CREDIT_CARD_NUMBER) {
       suggestion->value = credit_card->TypeAndLastFourDigits();
       suggestion->label = credit_card->GetInfo(
           AutofillType(CREDIT_CARD_EXP_DATE_2_DIGIT_YEAR), app_locale_);
     } else if (credit_card->number().empty()) {
       if (type.GetStorableType() != CREDIT_CARD_NAME) {
@@ skipping 404 matching lines @@
   }
   if (IsExperimentalWalletIntegrationEnabled() &&
       pref_service_->GetBoolean(prefs::kAutofillWalletImportEnabled)) {
     profiles_.insert(
         profiles_.end(), server_profiles_.begin(), server_profiles_.end());
   }
   return profiles_;
 }
 
 }  // namespace autofill