Summary: We only measure text at the root node, we shouldn't be trying to build a text storage later on for tree lower in the shadow node tree.
Reviewed By: nicklockwood
Differential Revision: D3212614
fb-gh-sync-id: 574fa7f2c029ca9ad2d5fabe7bbb148157f85ca7
fbshipit-source-id: 574fa7f2c029ca9ad2d5fabe7bbb148157f85ca7