The initial implementation did not work in certain cases.
For example, in the following case 'f' didn't have a shared name while
it should have had an empty shared name:
  var f = (function() { return function() { return 42; } }();

The new implementation ensures that all anonymous functions have empty
shared name and if any of them happen to be an object literal property
value or an accessor function or a concise method then such a function
is marked as having no shared name.

Bug: v8:6459
Change-Id: I0f936afce0c152d91b2b41c1dc475a5ed841eca0
Reviewed-on: https://chromium-review.googlesource.com/538666Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46026}