From the readme.txt in the dl:

'The Products and Services logos may be used to accurately reference Google's technology and tools. Please see www.google.com/permissions for use of Google brand assets and trademarks.'

From that link:

'All of our brand features are protected by applicable trademark, copyright and other intellectual property laws. If you would like to use any of our brand features on your website, in an ad, in an article or book, or reproduce them anywhere else, or in any other medium, you'll need to receive permission from Google first.'

From the presentation: "The Products and Services logos may be used to accurately reference Google's technology and tools."