In some places objects where allocated on the heap and stored
in a std::unique_ptr later. This CL changes this so that a

The std::unique_ptr<T>(new T(...)) construct is replaced with

std: :unique_ptr takes ownership of new objects immediately.
std: :make_unique<T>(...) where possible.
Change-Id: Icdb4c9e7536d2b437df1a5bb6c3ad94c97e1e4cc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1871916
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64603}