events: keycodes: Remove the stateless singleton instance of KeycodeConverter

remoting/host/input_injector_linux.cc

Index: remoting/host/input_injector_linux.cc
diff --git a/remoting/host/input_injector_linux.cc b/remoting/host/input_injector_linux.cc
index 3e4a5f6a26b05c67f20ca0fbe41315ff52756a09..34e1d38e856d106d8082571b711d6f02c4c67f53 100644
--- a/remoting/host/input_injector_linux.cc
+++ b/remoting/host/input_injector_linux.cc
@@ -276,14 +276,14 @@ void InputInjectorLinux::Core::InjectKeyEvent(const KeyEvent& event) {
     return;
   }
 
-  ui::KeycodeConverter* key_converter = ui::KeycodeConverter::GetInstance();
-  int keycode = key_converter->UsbKeycodeToNativeKeycode(event.usb_keycode());
+  int keycode =
+      ui::KeycodeConverter::UsbKeycodeToNativeKeycode(event.usb_keycode());
 
   VLOG(3) << "Converting USB keycode: " << std::hex << event.usb_keycode()
           << " to keycode: " << keycode << std::dec;
 
   // Ignore events which can't be mapped.
-  if (keycode == key_converter->InvalidNativeKeycode())
+  if (keycode == ui::KeycodeConverter::InvalidNativeKeycode())
     return;
 
   if (event.pressed()) {