Adam Comella 2b7cb46ddb iOS: Fix registration for UIContentSizeCategoryDidChangeNotification
Summary:
On an iPhone running iOS 10.3.3, I'm not seeing the UIContentSizeCategoryDidChangeNotification fire when changing the system's font scale setting. Registering for the event on `nil` instead of on the application object fixes the issue.

**Test Plan**

Verified that text in an RN app changes size when you change the system's font scale setting (Settings -> General -> Accessibility -> Larger Text). By default, RN text is supposed to scale with the system setting.

Adam Comella
Microsoft Corp.
Closes https://github.com/facebook/react-native/pull/15522

Differential Revision: D5657449

Pulled By: shergin

fbshipit-source-id: d7a6a730c5cd6eb3833274a1f2029663ad3a7ad2
2017-08-17 23:47:19 -07:00
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2017-08-17 17:16:19 -07:00