swift234

[CodeComplete] Adjust the end location of a delayed-parsing var decl. rdar://22981278

Before this commit, for a var decl at top level, code completion engine assumes the code
completion token contained in this decl is the end point of the delayed parsing, i.e. the
second pass of code completion. This may lead to incomplete ASTs during the second pass, for
instance, when the code completion token lies at the second argument of a call expr that takes
three arguments. We fix the issue by allowing the first pass to pre-register the end location of
a top-level var decl since the first pass is a more error-tolerant and holistic parsing, and the second
pass to reuse this loc.

Swift SVN r32729