I just tried it on a "big Angular project".
Works for me.

1. "Do It Now" button works for me.

2. Analysis DOES complete after some time.

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   Added CannotReproduce label.

WHy does Analysis need any time at all to do this? Renaming an empty BUILD.dart file to BUILD should be a nearly instantaneous operation.

AnalysisContextImpl invalidates everything when any new Dart source is added.

The reason is because it might have been referenced (and not found) by some libraries, and now these libraries may be resolved. There is TODO about this.

cc @bwilkerson.

Can we optimize the empty file case at least?
Should AnalysisContextImpl be invalidated when the .dart file is empty?
The use case described in this issue (e.g., creating a new empty file and then immediately renaming it) seems to be something we should handle better.
Also, maybe we should special case new file creation so that BUILD does not become BUILD.dart to begin with.

Added NeedsInfo label.

Fix for BUILD remaining just BUILD - https://codereview.chromium.org/344033003/

Set owner to @bwilkerson.
Removed Area-Editor label.
Added Area-Analyzer label.

Removed this from the 1.6 milestone.
Added Oldschool-Milestone-1.6 label.

Removed Oldschool-Milestone-1.6 label.

This is certainly working now.

Added Fixed label.

Added this to the 1.8 milestone.