CSSStyleDeclaration.getPropertyValue() should not return null

[efortuna]

This bug is a request for the corresponding change to the dartium code to make CSSStyleDeclaration.getPropertyValue return empty string if the returned value is actually null. This bug was originally Issue #2154, but with CL: https://codereview.chromium.org/11047008 I've made the fix for the dart2js version to work (returning an empty string). When we make this change in Dartium, we can remove the line in the html.status file:

[ $compiler == none && ($runtime == drt || $runtime == dartium) ]
cssstyledeclaration_test: Fail # INeed to make corresponding dartium change.

[DartBot]

This comment was originally written by [email protected]

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Emily, as discussed in original bug I am not quite sure if we should we should deviate from WebKit here.

But technically it should be rather easy to implement, just want to have an explicit confirmation we decided to diverge from WebKit here.

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Added NeedsInfo label.

[efortuna]

Check out blois's comment here: http://code.google.com/p/dart/issues/detail?id=2154#c20 -- I thought we'd decided to return empty strings for consistency? I and the other Seattleites are available to chat about this whenever.

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Added Triaged label.

[DartBot]

This comment was originally written by [email protected]

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Set owner to [email protected].
Added Fixed label.