Dwayne Slater 4488f58acf Set _imageInfo to null BEFORE adding listener to new ImageStream (#13825)
* Set _imageInfo to null before adding listener to new ImageStream

Fixes an edge case where switching the ImageStream to an already completed ImageStream caused the Image widget to show nothing. ImageStreamCompleter calls the listener during addListener if their image is already loaded.

* Fix whitespace

* Add test to verify correct behavior

* Added test from mravn-google's PR
2018-01-16 10:14:01 -08:00
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2018-01-10 16:42:45 -08:00
2017-12-21 16:44:42 -08:00