Migrate WTF time types in renderer/core/*test.cc to their base:: counterparts

As part of the wtf/time.h removal we're removing all the WTF wrappers for the
base::Time types. In order to keep the change under control we're migrating them
all in smaller parts. This is a mechanical replacement for all the *test.cc
files in blink/renderer/core as they account for half of the replacements.

Bug: 919383
Change-Id: I30beed6eae338b8250619a3da42feba264231d18
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1663419
Commit-Queue: Sergio Villar <svillar@igalia.com>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#670399}
31 files changed