exo: Produce an error if get_keyboard_device_configuration is called with a keyboard object that al…

components/exo/keyboard.cc

Index: components/exo/keyboard.cc
diff --git a/components/exo/keyboard.cc b/components/exo/keyboard.cc
index 206b61f72c5b4c9ac404989b32f272b4e29ec126..cadf270586f6ada2895394aad91ce118ef94ca11 100644
--- a/components/exo/keyboard.cc
+++ b/components/exo/keyboard.cc
@@ -114,6 +114,10 @@ Keyboard::~Keyboard() {
   helper->RemoveInputDeviceEventObserver(this);
 }
 
+bool Keyboard::HasDeviceConfigurationDelegate() const {
+  return device_configuration_delegate_ != nullptr;

[reveman, 2016/12/12 11:52:56]

nit: !!device_configuration_delegate_ is preferred in exo code and I think
chromium in general too

[yhanada, 2016/12/12 15:44:03]

Thanks for pointing it out. Done.

+}
+
 void Keyboard::SetDeviceConfigurationDelegate(
     KeyboardDeviceConfigurationDelegate* delegate) {
   device_configuration_delegate_ = delegate;