[css-writing-modes-3] 16 background-position tests

Hello,

https://hg.csswg.org/test/rev/47d9d8730bd4

http://test.csswg.org/source/css-writing-modes-3/background-position-vrl-002.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vlr-003.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vrl-004.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vlr-005.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vrl-006.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vlr-007.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vrl-008.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vlr-009.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vrl-010.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vlr-011.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vrl-012.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vlr-013.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vrl-014.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vlr-015.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vrl-016.xht

http://test.csswg.org/source/css-writing-modes-3/background-position-vlr-017.xht


Firefox 38.0a1 buildID 20150204150323 and IE11 pass all 16 tests.

Chrome 40.0.2214.111 fails
background-position-vrl-006
background-position-vrl-008
background-position-vrl-014
background-position-vrl-016
only because it does not implement 'height: auto' correctly in vertical 
writing-mode contexts.

Hajime,

When you have time, can you review these tests ?

Thank you!

Gérard
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