Have you been able to update your codebase to 1.0? How did you actually 
substitute all those /deep/ tags? Is there a shim/tool that can be used in 
runtime/compile time?

Our codebase is vastly dependant on Polymer 0.5. What we did is we packaged 
our whole web based application as downloadable applications for Ubuntu, 
Windows and OS X using http://nwjs.io/ with the V8 binaries that still 
support /deep/ tags. Then we asked the users to just download them. The 
application is used by a few very specific organizations internally so it 
is an acceptable tradeoff for the time being.

On Thursday, July 9, 2015 at 10:36:48 PM UTC+6, Eric Eslinger wrote:
>
> It does probably light a stronger fire under us slowpokes who are still 
> using the 0.5 release, however.
>
> On Thu, Jul 9, 2015 at 9:25 AM 'Kevin Schaaf' via Polymer <
> [email protected] <javascript:>> wrote:
>
>> Yes, the plan is to migrate all use of /deep/ and ::shadow in Polymer 
>> elements to custom properties, as it has been removed from the spec and as 
>> noted Chrome has posted deprecation warnings.  The vast majority of that 
>> migration was already done during the 1.0 port and anything remaining 
>> should be vestigial at this point and should be cleaned up soon.  I opened 
>> an issue for paper-slider; feel free to open issue on any other stragglers 
>> you find (a quick search didn't find any).
>>
>> It is unlikely that Chrome will actually remove support for these 
>> combinators in the immediate future and the Shady DOM styling shim does 
>> support it for now so there is no immediate risk of breakage; however our 
>> team rule is to not rely on them going forward, and users obviously 
>> shouldn't either.
>>
>> Kevin
>>
>>
>> On Wed, Jul 8, 2015 at 8:44 AM, Max <[email protected] <javascript:>> 
>> wrote:
>>
>>> I'd be interested to know the plans here, since it means existing app 
>>> will stop working with new browsers. Will there be some way to turn those 
>>> features on again?
>>>
>>> Max.
>>>
>>> On Mon, 6 Jul 2015 17:01 Eric Bidelman <[email protected] <javascript:>> 
>>> wrote:
>>>
>>>> +Taylor Savage <javascript:> +Yvonne Yip <javascript:> do we have 
>>>> plans to move away from the deprecated CSS features?
>>>>
>>>> On Wed, Jul 1, 2015 at 3:54 PM Pavel Sergeev <[email protected] 
>>>> <javascript:>> wrote:
>>>>
>>>>> Hello,
>>>>>
>>>>> there is a plan to remove /deep/ and ::shadow support from the dynamic 
>>>>> profile in Blink (http://crbug.com/489954).
>>>>> It means that /deep/ and ::shadow in CSS code will stop working in 
>>>>> Chrome soon.
>>>>>
>>>>> I know, that Polymer provides an alternative in a form of custom CSS 
>>>>> properties. However /deep/ and ::shadow
>>>>> are still used in implementation of several Polymer elements, either 
>>>>> directly (e.g. paper-slider/paper-slider.css) or
>>>>> indirectly, by using classes defined 
>>>>> in iron-flex-layout/classes/iron-flex-layout.html (e.g. <paper-tab>, 
>>>>> <paper-progress>).
>>>>>
>>>>> What do you think about that? Are you planning to eliminate usages of 
>>>>> /deep/ and ::shadow in Polymer elements implementations?
>>>>>
>>>>> Thanks
>>>>>
>>>>> --  
>>>>> Pavel
>>>>>
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