Reduce logging back to previous levels for most tests.

The dramatic increase to the amount of logging these tests do is killing the Chromium project's tryserver master. Reduce the pass, debug, and description logging back to their previous levels by default. Keep them all increased for the tests being actively debugged in http://crbug.com/393331 and http://crbug.com/407976 .
Added verbose logging back to texture-upload-size.html.
Merge pull request #687 from kenrussell/reduce-logging

Reduce logging back to previous levels for most tests.
Increase logging for gl-teximage.html for http://crbug.com/405577 .
Merge pull request #688 from kenrussell/gl-teximage-logging

Increase logging for gl-teximage.html for http://crbug.com/405577 .