Adds a `wholeExpression` parameter to `FlowAnalysis.nullShorting_end`;
the caller should pass in the whole expression whose null shorting is
ending. The new parameter is not used yet.
This paves the way for a follow-up CL
(https://dart-review.googlesource.com/c/sdk/+/464684) that will use
maps to store flow analysis `ExpressionInfo` and `_Reference` values;
it will allow that CL to remove appropriate entries from the map when
null shorting ends.
Change-Id: I6a6a6964d711fa000cc14898bfedbd06e93b6496
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/465983
Commit-Queue: Chloe Stefantsova <cstefantsova@google.com>
Reviewed-by: Chloe Stefantsova <cstefantsova@google.com>
Auto-Submit: Paul Berry <paulberry@google.com>
Paul Berry
92a7f7646c