Revert of Remove EF_FUNCTION_KEY and EF_NUMPAD_KEY.

ui/events/x/events_x.cc

Index: ui/events/x/events_x.cc
diff --git a/ui/events/x/events_x.cc b/ui/events/x/events_x.cc
index 9bf87c0e24c4e4b2a25aeedddf4d00b1340f4d0e..441aec529b079201084b513750218add7c60b4e3 100644
--- a/ui/events/x/events_x.cc
+++ b/ui/events/x/events_x.cc
@@ -191,6 +191,9 @@
 
   return GetEventFlagsFromXState(xevent->xkey.state) |
       (xevent->xkey.send_event ? ui::EF_FINAL : 0) |
+      (IsKeypadKey(XLookupKeysym(&xevent->xkey, 0)) ? ui::EF_NUMPAD_KEY : 0) |
+      (IsFunctionKey(XLookupKeysym(&xevent->xkey, 0)) ?
+          ui::EF_FUNCTION_KEY : 0) |
       ime_fabricated_flag;
 }
 
@@ -200,7 +203,11 @@
   DCHECK((xievent->evtype == XI_KeyPress) ||
          (xievent->evtype == XI_KeyRelease));
   return GetEventFlagsFromXState(xievent->mods.effective) |
-         (xevent->xkey.send_event ? ui::EF_FINAL : 0);
+         (xevent->xkey.send_event ? ui::EF_FINAL : 0) |
+         (IsKeypadKey(
+              XkbKeycodeToKeysym(xievent->display, xievent->detail, 0, 0))
+              ? ui::EF_NUMPAD_KEY
+              : 0);
 }
 
 // Get the event flag for the button in XButtonEvent. During a ButtonPress
@@ -301,6 +308,7 @@
     {ui::EF_ALTGR_DOWN, Mod5Mask},
     {ui::EF_COMMAND_DOWN, Mod4Mask},
     {ui::EF_MOD3_DOWN, Mod3Mask},
+    {ui::EF_NUMPAD_KEY, Mod2Mask},
     {ui::EF_LEFT_MOUSE_BUTTON, Button1Mask},
     {ui::EF_MIDDLE_MOUSE_BUTTON, Button2Mask},
     {ui::EF_RIGHT_MOUSE_BUTTON, Button3Mask},