Well, good news/bad news.
Bad news 1st - there is no Caps lock button.
Good news - there's a way to make one permanently, but I don't think you will. Ok, maybe I'm way wrong - but check this out....
1. You know the little magnifying glass that is where the Caps lock button should be? Click on it. What do you see? That's right - a Google Search button comes up without opening up a new tab - pretty awesome right?
2. Ok, Brad - that's cool - but how do I make a Caps lock button?
All you need to do is click on ctrl and the search and it will automatically get you CAPS lock. To disable - just click ctrl search again.
Are you old school and just want the Caps lock to be where the Caps lock should be? No worries - go into:
SETTINGS (bottom right of screen) and look under the device settings.
You will see Keyboard Settings - click on that.
Then, select SEARCH and then make it Caps lock. Now you have it back - but no "Search" button.
Up to you. Enjoy!