Mapped es-419 to es-MX for iOS.

chrome/app/google_chrome_strings.grd

Index: chrome/app/google_chrome_strings.grd
diff --git a/chrome/app/google_chrome_strings.grd b/chrome/app/google_chrome_strings.grd
index ec0a145d6b68b255288007284882fcf7d680e46b..3898018407827b0221a772be83681c3a5131684b 100644
--- a/chrome/app/google_chrome_strings.grd
+++ b/chrome/app/google_chrome_strings.grd
@@ -21,7 +21,13 @@ Chrome supports. -->
     <output filename="google_chrome_strings_en-GB.pak" type="data_package" lang="en-GB" />
     <output filename="google_chrome_strings_en-US.pak" type="data_package" lang="en" />
     <output filename="google_chrome_strings_es.pak" type="data_package" lang="es" />
-    <output filename="google_chrome_strings_es-419.pak" type="data_package" lang="es-419" />
+    <if expr="is_ios">
+      <!-- iOS uses es-MX for es-419 -->
+      <output filename="google_chrome_strings_es-MX.pak" type="data_package" lang="es-419" />
+    </if>
+    <if expr="not is_ios">
+      <output filename="google_chrome_strings_es-419.pak" type="data_package" lang="es-419" />
+    </if>
     <output filename="google_chrome_strings_et.pak" type="data_package" lang="et" />
     <output filename="google_chrome_strings_fa.pak" type="data_package" lang="fa" />
     <output filename="google_chrome_strings_fi.pak" type="data_package" lang="fi" />