Misleading errormessage when using a setter with ()

[DartBot]

This issue was originally filed by [email protected]

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What steps will reproduce the problem?

1. open editor
2. write this code:

 Element e = doc.querySelector('#test');
 e.textContent('irgendwas');

1. read warning/error in Problems tab: "textContent" is not a method in Element

Clearly the way the setter is used is wrong. But for compliance, why can't it be used as any other method?
If () are not acceptable for setters for whatever reason, the message should not be "is not a method". It should be "is a setter and must not be called like a method" or something like that.

[DartBot]

This comment was originally written by [email protected]

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Added Area-Editor, Triaged labels.

[bwilkerson]

Removed Area-Editor label.
Added Area-Compiler label.

[DartBot]

This comment was originally written by [email protected]

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http://codereview.chromium.org/8643001

$ dartc --noincremental /tmp/h.dart
file:/tmp/h.dart/h.dart:6: Use assignment to set field "textContent" in Element
     5: Element e;
     6: e.textContent('irgendwas');

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

[DartBot]

This comment was originally written by [email protected]

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r1750

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Added Fixed label.