Alexander Aprelev 5fc6b87174
Reland change that speeds up multiple devices hot-reload (#23695)
* Revert "Revert "Run reload asynchronously so that multiple devices can reload in parallel. (#22693)" (#23598)"

This reverts commit 0b68068d6a33f35cec568ae6a9b394ff2a9fdb76.

* Fix refreshViews so it sends app-wide(rather than per-isolate) service request.

Sending per-isolate request caused dead-lock in the engine in case of more-than-one ui isolate.
2018-10-29 18:51:57 -07:00
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