Implement a reference application for WebGL that allows to investigate performance issues

We need to put in place a performance test results comparing latest Qt release (Qt DC) against LTS releases. Each key area should have this in place, WebGL being one of the key areas.

Two areas to benchmark: Client side user experience (assumption is to use QMLBench plus something more) and server side load sending the UI to the client. The outcome is that we may in fact need two benchmarking tools.

We need this tool to be able to compare Qt releases (and patch releases), different hardwares, network and establish best practices / sample on what can be achieved. The tool can be handy also on troubleshooting issues on server, networking and client side.

See the link JIRA ticket (QTPM-1075) for example on another area.