Analyzer should implement const variables

[gbracha]

Per spec section 5. See issue #3549. This does not include treating finals statics as non-constants - that would be a separate bug.

[gbracha]

Added this to the M1 milestone.

[scheglov]

Set owner to @scheglov.
Added Accepted label.

[anders-sandholm]

Issue #3323 has been merged into this issue.

[scheglov]

https://chromiumcodereview.appspot.com/10536164/

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Added Started label.

[scheglov]

https://code.google.com/p/dart/source/detail?r=8670

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Added Fixed label.

[johnniwinther]

The test tests/language/const_var_test.dart is not handled.

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Added Triaged label.

[scheglov]

It looks as parser problem.

We need to support:
const v = 1;

and also somehow distinguish it from:
const A();

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Set owner to @bwilkerson.

[bwilkerson]

http://codereview.chromium.org/10857041/

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Added Fixed label.