Add country combobox to change country and rebuild address inputs.

chrome/browser/ui/autofill/country_combobox_model.cc

Index: chrome/browser/ui/autofill/country_combobox_model.cc
diff --git a/chrome/browser/ui/autofill/country_combobox_model.cc b/chrome/browser/ui/autofill/country_combobox_model.cc
index 8962b8261f3ba65fcae4294481bf067cbabd097b..707b76fabe3a73d173aaacf1afbd2ea0eef4565d 100644
--- a/chrome/browser/ui/autofill/country_combobox_model.cc
+++ b/chrome/browser/ui/autofill/country_combobox_model.cc
@@ -4,17 +4,20 @@
 
 #include "chrome/browser/ui/autofill/country_combobox_model.h"
 
+#include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "components/autofill/core/browser/autofill_country.h"
 #include "components/autofill/core/browser/personal_data_manager.h"
 #include "ui/base/l10n/l10n_util_collator.h"
+#include "ui/base/models/combobox_model_observer.h"
 
 namespace autofill {
 
-CountryComboboxModel::CountryComboboxModel(const PersonalDataManager& manager) {
+CountryComboboxModel::CountryComboboxModel(const PersonalDataManager& manager)
+    : default_index_(0) {
   // Insert the default country at the top as well as in the ordered list.
-  std::string app_locale = g_browser_process->GetApplicationLocale();
+  const std::string& app_locale = g_browser_process->GetApplicationLocale();
   std::string default_country_code =
       manager.GetDefaultCountryCodeForNewAddress();
   DCHECK(!default_country_code.empty());
@@ -61,4 +64,50 @@ bool CountryComboboxModel::IsItemSeparatorAt(int index) {
   return !countries_[index];
 }
 
+int CountryComboboxModel::GetDefaultIndex() const {
+  return default_index_;
+}
+
+void CountryComboboxModel::AddObserver(ui::ComboboxModelObserver* observer) {
+  observers_.AddObserver(observer);
+}
+
+void CountryComboboxModel::RemoveObserver(ui::ComboboxModelObserver* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+void CountryComboboxModel::ResetDefault() {
+  SetDefaultIndex(0);
+}
+
+void CountryComboboxModel::SetDefaultCountry(const std::string& country_code) {
+  DCHECK_EQ(2U, country_code.length());
+
+  for (size_t i = 0; i < countries_.size(); ++i) {
+    if (countries_[i] && countries_[i]->country_code() == country_code) {
+      SetDefaultIndex(i);
+      return;
+    }
+  }
+
+  NOTREACHED();
+}
+
+std::string CountryComboboxModel::GetDefaultCountryCode() const {
+  return countries_[default_index_]->country_code();
+}
+
+void CountryComboboxModel::SetDefaultIndex(int index) {
+  DCHECK_GE(index, 0);
+  DCHECK_LT(index, static_cast<int>(countries_.size()));
+  DCHECK(!IsItemSeparatorAt(index));
+
+  if (index == default_index_)
+    return;
+
+  default_index_ = index;
+  FOR_EACH_OBSERVER(ui::ComboboxModelObserver, observers_,
+                    OnComboboxModelChanged(this));
+}
+
 }  // namespace autofill