Add a test case to ensure drawBuffers([gl.NONE]) does not prevent internal drawbuffer clearing after compositing.

The test case is provided by jmuizelaar@mozilla.com.
Merge pull request #685 from zhenyao/mrt

Add a test case to ensure drawBuffers([gl.NONE]) does not prevent intern...
Update wtu.checkCanvas() to print out the actual color

This definitely helps us to better understand a failure.
Merge pull request #686 from zhenyao/pixel

Update wtu.checkCanvas() to print out the actual color
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 .
Add onerror handling for img/video loading.
Updates
Matrix Attribute Test

Add a conformance test that verifies matrix attribute locations do not clash with other shader attributes, regardless of their position in the attribute list.
Address feedback from Ken

- Alphabetically sorted 00_test_list.txt
- Replaced finishTest() with 'var successfullyParsed = true;'
Merge pull request #691 from RafaelCintron/matrixAttributes

Matrix Attribute Test
Remove onload arg from makeVideo.
Merge pull request #689 from zhenyao/onerror

Add onerror handling for img/video loading.
Refactored duplicated reportResults function and improved logging on failures. Thanks to hartmanng@chromium.org for pointing this out.
Merge pull request #692 from kenrussell/better-error-logging

Refactored duplicated reportResults function and improved logging on fai...