generated JavaScript for polymer elements dosn't call xxxChanged for published attributes

[DartBot]

This issue was originally filed by @zoechi

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What steps will reproduce the problem?
1.
We run into this problem
https://code.google.com/p/dart/issues/detail?id=15038
when porting

• https://github.com/ErikGrimes/polymer_elements
• https://github.com/ErikGrimes/polymer_ui_elements
  which have a demo page for each polymer element in the 'example' directory.
  So we changed the package layout as suggested:
  We created a new package and symlinked the demo pages from example
  to the new packages web directory
  removed the transformers settings in polymer_elements/polymer_ui_elements
  and added them to the pubspec.yaml of the new package.
  2.
  pub build works fine
  But in all JS demo pages the xxxChanged methods for published attributes never get called (except when called from other methods directly)
  Methods like enteredView or ready are called though.

3.
No warning or error is shown (build/execution)

What is the expected output? What do you see instead?
Should work in JS as in Dart

What version of the product are you using? On what operating system?
Dart VM version: 1.0.0.3_r30187 (Tue Nov 12 00:09:52 2013) on "linux_x64"

Please provide any additional information below.
Before we changed the package structure as described above some examples worked fine in JS (those that were not affected by the issue linked above)
I also tried copying the files to the new package instead of symlinking but the problem persisted.

[sethladd]

Added Area-Polymer, Triaged labels.

[DartBot]

This comment was originally written by @zoechi

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When I add
transformers:

• polymer:
      entry_points:
  (without any actual entry_points defined) to pubspec.yaml of the component package
  the generated JS works even when the package isn't supposed to have a polymer transformer specified.

Dart VM version: 1.0.1.3_r30657 (Mon Nov 25 18:29:39 2013) on "linux_x64"

[sigmundch]

Added Library-PolymerBuild label.

[DartBot]

This comment was originally written by @zoechi

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I think this is related to 18489

[sigmundch]

Added this to the 1.5 milestone.

[jmesserly]

Added Pkg-Polymer label.

[jmesserly]

Removed Pkg-Polymer label.
Added Pkg-PolymerBuild label.

[jmesserly]

Removed Library-PolymerBuild label.

[jmesserly]

Removed Area-Polymer label.
Added Area-Pkg label.

[kasperl]

Postponing to 1.6. Feel free to change this back (and give it a proper priority).

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Removed this from the 1.5 milestone.
Added this to the 1.6 milestone.

[DartBot]

This comment was originally written by @zoechi

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I still had this a while ago (when I added the comment at May 3) but this seems not to be an issue on all projects. Maybe this is only when the project has Polymer elements in lib and also uses elements imported from another package.

I didn't have this in other projects and this is the only notable distinction.

[sigmundch]

Thanks for the details!

I forgot to mention earlier, but I agree with you in #­4 that this will likely be fixed by issue #9.

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Marked this as being blocked by #18489.

[sigmundch]

Removed Priority-Unassigned label.
Added Priority-Medium label.

[sigmundch]

Removed this from the 1.6 milestone.
Added Polymer-P-1 label.

[sigmundch]

Removed Polymer-P-1 label.
Added Polymer-Milestone-Next label.

[sigmundch]

Added PolymerMilestone-Next label.

[sigmundch]

Removed Polymer-Milestone-Next label.

[sigmundch]

merging with issue #20267 to track things together.

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Added Duplicate label.
Marked as being merged into #20267.

[DartBot]

This issue has been moved to dart-archive/polymer-dart#369.