[ios] Enables the BuiltinProvider.

ios/chrome/browser/autocomplete/autocomplete_provider_client_impl.cc

Index: ios/chrome/browser/autocomplete/autocomplete_provider_client_impl.cc
diff --git a/ios/chrome/browser/autocomplete/autocomplete_provider_client_impl.cc b/ios/chrome/browser/autocomplete/autocomplete_provider_client_impl.cc
index 345b7a2d7a6309804c8efc78c290133eead9fca6..66c213b70887abdee87558f6774b3c99a5468d3d 100644
--- a/ios/chrome/browser/autocomplete/autocomplete_provider_client_impl.cc
+++ b/ios/chrome/browser/autocomplete/autocomplete_provider_client_impl.cc
@@ -119,14 +119,21 @@ AutocompleteProviderClientImpl::GetEmbedderRepresentationOfAboutScheme() {
 }
 
 std::vector<base::string16> AutocompleteProviderClientImpl::GetBuiltinURLs() {
-  // iOS does not supports BuiltinProvider.
-  return std::vector<base::string16>();
+  std::vector<std::string> chrome_builtins(
+      kChromeHostURLs, kChromeHostURLs + kNumberOfChromeHostURLs);
+  std::sort(chrome_builtins.begin(), chrome_builtins.end());
+
+  std::vector<base::string16> builtins;
+  for (auto& url : chrome_builtins) {
+    builtins.push_back(base::ASCIIToUTF16(url));
+  }
+  return builtins;
 }
 
 std::vector<base::string16>
 AutocompleteProviderClientImpl::GetBuiltinsToProvideAsUserTypes() {
-  // iOS does not supports BuiltinProvider.
-  return std::vector<base::string16>();
+  return {base::ASCIIToUTF16(kChromeUIChromeURLsURL),
+          base::ASCIIToUTF16(kChromeUIVersionURL)};
 }
 
 bool AutocompleteProviderClientImpl::IsOffTheRecord() const {