Bug 891316 part.1 Make widget::MSGResult struct and use it in nsWindow r=jimm
Bug 891316 part.2 Use widget::MSGResult in widget::WindowHook r=jimm
Bug 891316 part.3 Use widget::MSGResult in widget::MouseScrollHandler r=jimm
Bug 891316 part.4 Use widget::MSGResult at nsWindow::ProcessMessageForPlugin r=jimm
Bug 891316 part.5 Use widget::MSGResult in widget::IMEHandler r=jimm
Bug 891316 part.6 Use widget::MSGResult in nsIMEHandler r=jimm
Bug 891316 part.7 Refactor nsIMM32Handler::OnIME*() r=jimm
Bug 891316 part.8 Refactor other nsIMM32Handler::On*() r=jimm