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Valentin Shergin
013b39f32c
Summary: (This is the second version of the diff that includes additional checkes and syncronization around `start` and `stop` methods). This diff migrates iOS renderer to using SurfaceHandler directly instead of calling Scheduler methods. Major changes: * RCTFabricSurface only stores a SurfaceHandler and platform-specific parts (such as a UIView instance and TouchHandler); all other pieces of state are stored in SurfaceHandler object. * All the state changes initiated from RCTFabricSurface are performed via calling corresponding methods on SurfaceHandler (bypassing RCTSurfacePresenter, RCTScheduler, Scheduler, and UIManager). * Every RCTSurfaceHandler is responsible for observing `UIContentSizeCategoryDidChangeNotification` and communicating the change down to SurfaceHandler. (Besides code simplifications it's more correct because on iOS the DPI actually depends on a particular UIScreen/UIWindow associated with UIView and *not* global for the whole app.) Changelog: [Internal] Fabric-specific internal change. Reviewed By: ShikaSD Differential Revision: D26614577 fbshipit-source-id: 428f4c4cc1ca46cd97be0413e9279e29a54807f6