Retire some metrics and update file util methods for JumpList
This CL retires some file deletion related metrics for JumpList since
they're no longer needed.
Accordingly, the JumpList file deletion related methods are updated to
return nothing instead of the detailed delete status which is used for
the retiring metrics. This makes the ENUMs for the delete status no
long needed so they're removed. These methods are also refactored a
little bit to make them cleaner.
BUG=40407, 179576
Review-Url: https://codereview.chromium.org/2836363003
Cr-Commit-Position: refs/heads/master@{#468425}
5 files changed
