Polymer linter should log if an element is not importing polymer.html

[DartBot]

<img src="https://avatars.githubusercontent.com/u/17034?v=3" align="left" width="96" height="96"hspace="10"> Issue by kevmoo
Originally opened as dart-lang/sdk#20538

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Per discussion w/ jakemac

[DartBot]

<img src="https://avatars.githubusercontent.com/u/2049220?v=3" align="left" width="48" height="48"hspace="10"> Comment by sigmundch

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this is already checked by the linter - is it not shown correctly?

[DartBot]

<img src="https://avatars.githubusercontent.com/u/984921?v=3" align="left" width="48" height="48"hspace="10"> Comment by jakemac53

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Looks like its just not making it through to the logging widget for some reason

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Added Started label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/984921?v=3" align="left" width="48" height="48"hspace="10"> Comment by jakemac53

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Set owner to @jakemac53.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/984921?v=3" align="left" width="48" height="48"hspace="10"> Comment by jakemac53

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Ah, the issue is we are not properly propagating up all errors from the original files, only errors coming from the top level file. When inlining files we need to also add their log warnings to the top level files output.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/984921?v=3" align="left" width="48" height="48"hspace="10"> Comment by jakemac53

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Fixed in dart-lang/sdk@d85ac4c

[DartBot]

<img src="https://avatars.githubusercontent.com/u/984921?v=3" align="left" width="48" height="48"hspace="10"> Comment by jakemac53

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Added Fixed label.