GitLab

Follow-up to the split CL.
Just clean-up, no changes to generated EventInterfaces.in.

* Rename to generate_event_interfaces (from "*_names")
This is b/c:
- the output file is called EventInterfaces.in
- the output file is used for both EventFactory and EventNames

* Remove EventInterfaces.in from run-bindings-tests
This file is useless, and adds unnecessary complexity to r-b-t.
The actual output file is trivial:
namespace="Event"

Source/bindings/tests/idls/TestInterfaceEventConstructor
...and I've never looked at it during CG changes.

With it, we need to have 2 passes of compute_interfaces_info,
and a separate temporary file.
Without it, once Terry's CL lands, we'll have no individual files,
and we can just use one temporary directory, removing lots of
temp file complexity.

* Compute source_dir robustly (not using getcwd)

* Refactoring and renaming

Follow-up to:
Split generate_event_interfaces.py from compute_interfaces_info.py
https://codereview.chromium.org/185303008/

BUG=341748
R=haraken

Review URL: https://codereview.chromium.org/186433003

git-svn-id: svn://svn.chromium.org/blink/trunk@168599 bbb929c8-8fbe-4397-9dbb-9b2b20218538