Add pixel test for <select> -webkit-autofil style

Add pixel test for <select> -webkit-autofil style

R=tkent@chromium.org
BUG=58719
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=170623

[ziran.sun, 2014-03-28 14:36:23]

Pixel test for <select> -webkit-autofill style is now added :). Please review.
Thanks!

[tkent, 2014-03-31 02:17:43]

Would you add testRunner.setUseMockTheme(false) to the test in order to check
the behavior with real form control, or add the test case to
fast/forms/select/menulist-appearance-basic.html please?

https://codereview.chromium.org/216923003/diff/20001/LayoutTests/TestExpectat...
File LayoutTests/TestExpectations (right):

https://codereview.chromium.org/216923003/diff/20001/LayoutTests/TestExpectat...
LayoutTests/TestExpectations:115: # Pixel test for <select> -webkit-autofil
style. Needs rebaseline for different platforms.
Do not add a comment.  The rebaseline bot automatically removes the following
line, but won't remove the comment.

[ziran.sun, 2014-04-01 15:53:45]

Code updated as per review comments. All comments have been addressed. Please
review. Thanks!

[tkent, 2014-04-02 00:35:47]

lgtm

select-autofilled-expected.png doesn't look the latest result, but it's ok
because the auto-rebaseline-bot will update it.

[tkent, 2014-04-02 00:35:50]

The CQ bit was checked by tkent@chromium.org

[commit-bot: I haz the power, 2014-04-02 00:35:55]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ziran.sun@samsung.com/216923003/40001

[commit-bot: I haz the power, 2014-04-02 01:43:22]

Change committed as 170623