Facebook bought WhatsApp for $19 billion Last year. The intention of Facebook to buy WhatsApp was Unknown. But now we have a clear idea of it.
In a recent update to Facebook for Android app ( Version 22.214.171.124.13) , a new Button "SEND" was added among the action buttons which appear below a Post or Update. This button has a icon which looks like WhatsApp's icon. This gives an idea that facebook is trying to integrate WhatsApp and Facebook Mobile App.
The use of this Button might be for sharing the post link into WhatsApp. But still there is no confirmation on that from facebook. Later we can expect features such as Sending messages between WhatsApp and Facebook App or Vice-versa.
Image source : Geektime via Techworm