Allow keys with AltGr modifier to be inserted in Textfield

ui/events/base_event_utils.cc

Index: ui/events/base_event_utils.cc
diff --git a/ui/events/base_event_utils.cc b/ui/events/base_event_utils.cc
index 30854bc90b31134540098fa3b9f2b30448acca1f..ffff0f1da12e42f4475ba7fcd36d22c80f50b82f 100644
--- a/ui/events/base_event_utils.cc
+++ b/ui/events/base_event_utils.cc
@@ -34,7 +34,10 @@ uint32 GetNextTouchEventId() {
 }
 
 bool IsSystemKeyModifier(int flags) {
-  return (kSystemKeyModifierMask & flags) != 0;
+  // AltGr modifier is used to type alternative keys on certain keyboard layouts
+  // so we don't consider keys with the AltGr modifier as a system key.
+  return (kSystemKeyModifierMask & flags) != 0 &&
+         (EF_ALTGR_DOWN & flags) == 0;
 }
 
 }  // namespace ui