Mapped es-419 to es-MX for iOS.

components/component_strings.grd

Index: components/component_strings.grd
diff --git a/components/component_strings.grd b/components/component_strings.grd
index b50c4da054a8d7ff5dae39292bae2c293606975f..85b5d613a47708c228535f5b83cfc4e07e0aa151 100644
--- a/components/component_strings.grd
+++ b/components/component_strings.grd
@@ -33,7 +33,13 @@
       <output filename="component_strings_eo.pak" type="data_package" lang="eo" />
     </if>
     <output filename="component_strings_es.pak" type="data_package" lang="es" />
-    <output filename="component_strings_es-419.pak" type="data_package" lang="es-419" />
+    <if expr="is_ios">
+      <!-- iOS uses es-MX for es-419 -->
+      <output filename="component_strings_es-MX.pak" type="data_package" lang="es-419" />
+    </if>
+    <if expr="not is_ios">
+      <output filename="component_strings_es-419.pak" type="data_package" lang="es-419" />
+    </if>
     <output filename="component_strings_et.pak" type="data_package" lang="et" />
     <if expr="pp_ifdef('use_third_party_translations')">
       <output filename="component_strings_eu.pak" type="data_package" lang="eu" />