servo/servo — pull request #3283 by glennw (2014-09-11 02:12:19+00:00)
Title: Partial fix for background images on wikipedia pages.

This fixes the visual artifacts seen at the top of wikipedia pages by:
- Setting clipping rect to avoid images going outside their bounds.
- Handling case of background-position being >= 100% such that wrapping is required.

However, the gradient is not currently visible on wikipedia. This relies on bug #1997 being fixed.