instance fields on CanvasRenderingContext2D [fillStyle, globalAlpha, strokeStyle] warn as 'final' in Dart Editor

[kevmoo]

What steps will reproduce the problem?

1. Create a reference to CanvasRenderingContext2D in variable ctx
2. Assign a value to fillStyle, globalAlpha, strokeStyle
3. Notice warnings that all of these fields are 'final'

What is the expected output? What do you see instead?

 - I expect Dart Editor to be happy I'm playing with canvas.

What version of the product are you using? On what operating system?

 - Dart Continuous 8008

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Attachment:
[Screen Shot 2012-05-25 at 11.50.37 AM.png](https://storage.googleapis.com/google-code-attachments/dart/issue-3248/comment-0/Screen Shot 2012-05-25 at 11.50.37 AM.png) (34.15 KB)

[stevemessick]

Assignments to Element.src are also getting warnings.

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Set owner to @scheglov.
Added Area-Editor, Triaged labels.

[stevemessick]

Issue #3249 has been merged into this issue.

[DartBot]

This comment was originally written by @bp74

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and many others too:

AudioElement: currentTime/loop/volume
CanvasElement: width/height
AudioBufferSourceNode: buffer/loop
AudioGainNode: gain.value
...

I think it is a more general problem with the html library.

[scheglov]

Issue #3252 has been merged into this issue.

[scheglov]

https://chromiumcodereview.appspot.com/10441057/

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Added Started label.

[scheglov]

https://code.google.com/p/dart/source/detail?r=8065

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Added Fixed label.

[kevmoo]

Confirmed fixed in 8075. Cheers!