update shadowdom polyfill to latest

update shadowdom polyfill to latest.

Note: all of the changes to .debug.js and .min.js come from upstream

I also simplified our patch, because we are now almost unforked upstream code (we just have a couple of fixes they haven't merged yet). In particular we can't use _ShadowDOMPolyfill$isGeneratedWrapper so we go back to 'GeneratedWrapper'.

I'm trying to align our build logic more closely to:
https://github.com/Polymer/platform/blob/master/gruntfile.js#L10, hence the use of their build.json files.

This fixes: https://code.google.com/p/dart/issues/detail?id=13054

R=efortuna@google.com

Committed: https://code.google.com/p/dart/source/detail?r=27210

[Jennifer Messerly, 2013-09-05 05:02:31]

with this change, Polymer+Firefox is working again :)

[Emily Fortuna, 2013-09-05 18:19:09]

lgtm. 

I made a comment on shadow_dom.debug.js which I know you didn't write and comes
from upstream, so feel free to disregard.

https://codereview.chromium.org/23548014/diff/4001/pkg/shadow_dom/lib/shadow_...
File pkg/shadow_dom/lib/shadow_dom.debug.js (right):

https://codereview.chromium.org/23548014/diff/4001/pkg/shadow_dom/lib/shadow_...
pkg/shadow_dom/lib/shadow_dom.debug.js:581: 
remove extra line here?

https://codereview.chromium.org/23548014/diff/4001/pkg/shadow_dom/lib/shadow_...
File pkg/shadow_dom/lib/shadow_dom.min.js (right):

https://codereview.chromium.org/23548014/diff/4001/pkg/shadow_dom/lib/shadow_...
pkg/shadow_dom/lib/shadow_dom.min.js:1:
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hmm John, I think the formatting could be improved here (j/k) :-)

https://codereview.chromium.org/23548014/diff/4001/pkg/shadow_dom/tool/gruntf...
File pkg/shadow_dom/tool/gruntfile.js (right):

https://codereview.chromium.org/23548014/diff/4001/pkg/shadow_dom/tool/gruntf...
pkg/shadow_dom/tool/gruntfile.js:7: // recursive module builder
nit: comments start with capital letter and end with a period. Although it looks
like this convention isn't followed elsewhere in this file... whatever you think
best.

[Jennifer Messerly, 2013-09-05 19:47:02]

Thanks! Can you please take another look? I have added "build.sh" and updated
the README to reflect current instructions.

https://codereview.chromium.org/23548014/diff/4001/pkg/shadow_dom/lib/shadow_...
File pkg/shadow_dom/lib/shadow_dom.debug.js (right):

https://codereview.chromium.org/23548014/diff/4001/pkg/shadow_dom/lib/shadow_...
pkg/shadow_dom/lib/shadow_dom.debug.js:581: 
On 2013/09/05 18:19:10, Emily Fortuna wrote:
> remove extra line here?

I submitted a pull request for upstream:
https://github.com/Polymer/ShadowDOM/pull/241

https://codereview.chromium.org/23548014/diff/4001/pkg/shadow_dom/tool/gruntf...
File pkg/shadow_dom/tool/gruntfile.js (right):

https://codereview.chromium.org/23548014/diff/4001/pkg/shadow_dom/tool/gruntf...
pkg/shadow_dom/tool/gruntfile.js:7: // recursive module builder
On 2013/09/05 18:19:10, Emily Fortuna wrote:
> nit: comments start with capital letter and end with a period. Although it
looks
> like this convention isn't followed elsewhere in this file... whatever you
think
> best.

yeah, I think the Polymer folks aren't following it :|

fixed these ones tho.

[Emily Fortuna, 2013-09-05 20:00:07]

looks good (lgtm), plus a nicely commented bash file! :-)

[Jennifer Messerly, 2013-09-05 20:26:15]

Committed patchset #4 manually as r27210 (presubmit successful).

[Siggi Cherem (dart-lang), 2013-09-08 18:44:22]

https://codereview.chromium.org/23548014/diff/10001/pkg/shadow_dom/lib/src/pl...
File pkg/shadow_dom/lib/src/platform/patches-shadowdom-polyfill.js (right):

https://codereview.chromium.org/23548014/diff/10001/pkg/shadow_dom/lib/src/pl...
pkg/shadow_dom/lib/src/platform/patches-shadowdom-polyfill.js:43: // we know it
is some kind of Shadow DOM wrapper object.
I thought this is safe in debug mode, but that in minified mode the constructor
name appears obfuscated. Is there anything we can do to work around that?