Fix release builds for iOS. Add stub chromium impl for preferences.

remoting/client/ios/BUILD.gn

Index: remoting/client/ios/BUILD.gn
diff --git a/remoting/client/ios/BUILD.gn b/remoting/client/ios/BUILD.gn
index 03dbfb3881e27131578e12ad138b99bb1b823c76..55b1894b1745a96f9902a63dc5ca6c668a949aa0 100644
--- a/remoting/client/ios/BUILD.gn
+++ b/remoting/client/ios/BUILD.gn
@@ -39,6 +39,11 @@ source_set("ios_core") {
 
   if (!is_chrome_branded) {
     sources += [ "host_preferences_persistence_chromium.mm" ]
+  } else {
+    # TODO(nicholss): Until we have a private implementation of this, stub it
+    # with the chromium version. We still want the logic of is_chrome_branded
+    # but to get the release builds building we will just reuse the file.
+    sources += [ "host_preferences_persistence_chromium.mm" ]
   }
 
   public_deps = [