MozReview-Commit-ID: 7wH5XcILVmX
MozReview-Commit-ID: 8iOALQylOuK
We also make sure that an element never has an ElementData with ElementDataStyles::Uninitialized, and eagerly call prepare_for_styling whenever an ElementData is instantiated. MozReview-Commit-ID: 9YP6eSmdMt0
MozReview-Commit-ID: 9LZ1WPQADav