This refactoring reduces the LoC after preprocessor expansion by 370,322

gen         (   21 files):    71,503 to    1,631,168 (   23x)
src         (  624 files):   367,639 to   53,231,764 (  145x)
test        (  392 files):   490,770 to   37,450,839 (   76x)
third_party (  432 files):   239,085 to    9,547,902 (   40x)
total       ( 1521 files): 1,183,681 to  102,836,194 (   87x)

gen         (   21 files):    71,503 to    1,613,222 (   23x)
src         (  624 files):   367,634 to   52,964,046 (  144x)
test        (  392 files):   490,771 to   37,366,181 (   76x)
third_party (  432 files):   239,085 to    9,547,902 (   40x)
total       ( 1521 files): 1,183,677 to  102,465,872 (   87x)

Bug: v8:8562
Change-Id: Ib4e771c37471a2ff19c5538e62c038943cc74eaf
Reviewed-on: https://chromium-review.googlesource.com/c/1382469Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58349}