The messenger giant WhatApp will be allowing its users to save chats to Google Drive.The messenger has recently added a new feature which allows the users to use voice feature in addition to send text message.
In order to use this facility users will need the latest build of WhatsApp for this, which is version 2.12.45. This version will soon be available on the official WhatsApp site or Google Play Store.
In order to save the build, once you update the app, you can then go to settings, then chat settings and chat backup. There will you see the Google Drive option and once you switch on Chat backup, the option to save to Google Drive should be available.