Currently Chrome's UI event testing is all written by hand. This has led to a series of tests being either completely incorrect or to have small errors on certain platforms. Issue 656712 is an example of this.

In order to address this a developer tool will be written to serialize operating system input events. Additionally a testing framework to replay these events will be created.

This will allow tests to be written based on the actual events seen on various platforms. Which will catch bugs at code submission time, instead of when users notice bugs after release.

This will also allow UI developers to have an easier time writing their tests.

This will also form the basis for writing new performance tests for MUS