[Merge] Make mouse buttons 8 - 11 navigate forward and back in history

ui/events/ozone/evdev/event_factory_evdev.cc

Index: ui/events/ozone/evdev/event_factory_evdev.cc
diff --git a/ui/events/ozone/evdev/event_factory_evdev.cc b/ui/events/ozone/evdev/event_factory_evdev.cc
index e264f3530a75ae626bf98d0e52857200741f2221..fe2150158d2d816107c222ef6988ced5b29fa0e7 100644
--- a/ui/events/ozone/evdev/event_factory_evdev.cc
+++ b/ui/events/ozone/evdev/event_factory_evdev.cc
@@ -178,6 +178,12 @@ void EventFactoryEvdev::DispatchMouseButtonEvent(
     case BTN_MIDDLE:
       modifier = EVDEV_MODIFIER_MIDDLE_MOUSE_BUTTON;
       break;
+    case BTN_BACK:
+      modifier = EVDEV_MODIFIER_BACK_MOUSE_BUTTON;
+      break;
+    case BTN_FORWARD:
+      modifier = EVDEV_MODIFIER_FORWARD_MOUSE_BUTTON;
+      break;
     default:
       return;
   }