<!--
If you are asking a question rather than filing a bug, try one of these instead:
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- Mailing List (https://groups.google.com/forum/#!forum/polymer-dev)
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<!-- Instructions For Filing a Bug: https://github.com/Polymer/polymer/blob/master/CONTRIBUTING.md#filing-bugs -->
### Description
<!-- Example: Error thrown when calling `appendChild` on Polymer element -->

#### Live Demo
<!-- Fork this JSBin, or provide your own URL -->
https://jsbin.com/xukike/edit?html,output

#### Steps to Reproduce
<!--
Example:

1. Create `my-element`
2. Append `my-element` to document.body
3. Create `div`.
4. Append `div` to `my-element`
-->


#### Expected Results
<!-- Example: No error is throw -->

#### Actual Results
<!-- Example: Error is thrown -->

### Browsers Affected
<!-- Check all that apply -->
- [ ] Chrome
- [ ] Firefox
- [ ] Edge
- [ ] Safari 9
- [ ] Safari 8
- [ ] IE 11

### Versions
<!--
`Polymer.version` will show the version for Polymer
`bower ls` or `npm ls` will show the version of webcomponents.js or webcomponents-lite.js
-->
- Polymer: vX.X.X
- webcomponents: vX.X.X 

<!--
If you are asking a question rather than filing a bug, try one of these instead:
- StackOverflow (http://stackoverflow.com/questions/tagged/polymer)
- Polymer Slack Channel (https://bit.ly/polymerslack)
- Mailing List (https://groups.google.com/forum/#!forum/polymer-dev)
-->
<!-- Instructions For Filing a Bug: https://github.com/Polymer/polymer/blob/master/CONTRIBUTING.md#filing-bugs -->
### Description
<!-- Example: Error thrown when calling `appendChild` on Polymer element -->

#### Live Demo
<!-- Fork this JSBin, or provide your own URL -->
http://jsbin.com/luhaxab/1/edit

#### Steps to Reproduce
<!--
Example:

1. Create `my-element`
2. Append `my-element` to document.body
3. Create `div`.
4. Append `div` to `my-element`
-->


#### Expected Results
<!-- Example: No error is throw -->

#### Actual Results
<!-- Example: Error is thrown -->

### Browsers Affected
<!-- Check all that apply -->
- [ ] Chrome
- [ ] Firefox
- [ ] Edge
- [ ] Safari 9
- [ ] Safari 8
- [ ] IE 11

### Versions
<!--
`Polymer.version` will show the version for Polymer
`bower ls` or `npm ls` will show the version of webcomponents.js or webcomponents-lite.js
-->
- Polymer: vX.X.X
- webcomponents: vX.X.X 

Update jsBin template for 2.0
Update jsBin template for 2.0