Add US international keyboard layout for Portuguese Brazilian.

chrome/browser/chromeos/input_method/input_method_util.cc

Index: chrome/browser/chromeos/input_method/input_method_util.cc
diff --git a/chrome/browser/chromeos/input_method/input_method_util.cc b/chrome/browser/chromeos/input_method/input_method_util.cc
index feb8f4367bfc58276d808fe9aa60581af7b7f8e3..8bdceeb1b622e0b9d67493943bcd73129e5e2651 100644
--- a/chrome/browser/chromeos/input_method/input_method_util.cc
+++ b/chrome/browser/chromeos/input_method/input_method_util.cc
@@ -300,6 +300,8 @@ const struct ExtraLanguage {
   { "es-419", "xkb:latam::spa" },
   // For Malay, use US keyboard layout. crosbug.com/p/8288
   { "ms", "xkb:us::eng" },
+  // For Brazil, it is common to use US-international keyboard layout.
+  { "pt-BR", "xkb:us:intl:eng" },
 
   // TODO(yusukes): Add {"sw", "xkb:us::eng"} once Swahili is removed from the
   // blacklist in src/ui/base/l10n/l10n_util_posix.cc.