Use dropdown list for admin areas in pr form.

third_party/libaddressinput/chromium/chrome_address_validator.cc

Index: third_party/libaddressinput/chromium/chrome_address_validator.cc
diff --git a/third_party/libaddressinput/chromium/chrome_address_validator.cc b/third_party/libaddressinput/chromium/chrome_address_validator.cc
index b0bd189d8f0542de34bc185ab102e1cee1d2b28d..9ae9069ddbf91968feb766d623260971e0683317 100644
--- a/third_party/libaddressinput/chromium/chrome_address_validator.cc
+++ b/third_party/libaddressinput/chromium/chrome_address_validator.cc
@@ -17,6 +17,7 @@
 #include "third_party/libaddressinput/src/cpp/include/libaddressinput/address_normalizer.h"
 #include "third_party/libaddressinput/src/cpp/include/libaddressinput/source.h"
 #include "third_party/libaddressinput/src/cpp/include/libaddressinput/storage.h"
+#include "third_party/libaddressinput/src/cpp/src/rule.h"
 
 namespace autofill {
 namespace {
@@ -27,6 +28,7 @@ using ::i18n::addressinput::AddressNormalizer;
 using ::i18n::addressinput::BuildCallback;
 using ::i18n::addressinput::FieldProblemMap;
 using ::i18n::addressinput::PreloadSupplier;
+using ::i18n::addressinput::Rule;
 using ::i18n::addressinput::Source;
 using ::i18n::addressinput::Storage;
 
@@ -58,6 +60,22 @@ void AddressValidator::LoadRules(const std::string& region_code) {
   supplier_->LoadRules(region_code, *rules_loaded_);
 }
 
+std::vector<std::string> AddressValidator::GetRegionSubKeys(
+    const std::string& region_code) {
+  DCHECK(AreRulesLoadedForRegion(region_code));
+
+  auto rules = supplier_->GetRulesForRegion(region_code);
+  auto rule_iterator = rules.find("data/" + region_code);
+
+  if (rule_iterator != rules.end()) {
+    if (rule_iterator->second)
+      return (rule_iterator->second)->GetSubKeys();
+    return std::vector<std::string>();
+  } else {
+    return std::vector<std::string>();
+  }
+}
+
 AddressValidator::Status AddressValidator::ValidateAddress(
     const AddressData& address,
     const FieldProblemMap* filter,
@@ -141,7 +159,7 @@ void AddressValidator::RulesLoaded(bool success,
                                    const std::string& region_code,
                                    int) {
   if (load_rules_listener_)
-    load_rules_listener_->OnAddressValidationRulesLoaded(region_code, success);
+    load_rules_listener_->OnAddressRulesLoaded(region_code, success);
 
   // Count the first failed attempt to load rules as well.
   if (success || attempts_number_[region_code] + 1 >= kMaxAttemptsNumber)