Chromium Linux Fontconfig Renderstyle

This test requires Chromium Linux test_shell in --layout-test mode, as that forces some rendering settings used in the following tests.

1. The following text should render without anti-aliasing:

2. The following text should be slightly-hinted Georgia. The dots should be equally spaced, and letters in the word "government" should be naturally spaced (without an ugly space before the "e").

3. The following text should be unhinted Verdana. The fontconfig configuration for this is contradictory, setting both full-hinting and no-hinting. The latter should win out.

4. The following text should show a difference caused by forcing autohinting. Note: the effect is subtle.

5. The following text should be the same. It verifies that, given the contradictory settings hintfull and autohint, the latter wins out:

6. The following text should show that fontconfig can be used to enable or disable subpixel rendering.