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Ahmed El-Helw c62840c7a8 RCTVirtualText wasn't clickable in certain cases

Summary:
Text in Nodes is squashed into a single DrawCommand for drawing a
Boring or StaticLayout. Touch is handled using a TextNodeRegion subclass of
NodeRegion that knows how to identify pieces of text inside of the DrawCommand
based on spans in the text. However, we only use a TextNodeRegion on the
second call for updateNodeRegion for an RCTText. If there is only one call,
the NodeRegion will just be a normal one. This patch ensures that the
NodeRegion for an RCTText is always a TextNodeRegion, allowing for null
Layouts that are set when the DrawCommand is made.

Reviewed By: astreet

Differential Revision: D3291682

2016-12-19 13:40:26 -08:00