As a Chromium developer, whenever you change something in the source code, some bots run automatically and make sure you didn’t break anything.
That’s a good behaviour, but sometimes you’d like to trigger these bots manually. That’s why you make some “fake” changes into a dedicated file for this.
Chromium Team had a cool idea about these “fake” changes: Why not make a story of it? Idea is pretty simple: Each time you make a change, add one sentence
You can actually read the ongoing story at http://src.chromium.org/svn/trunk/src/build/whitespace_file.txt