Autoformat everything except tests/examples

Done by:
- Appending an extra newline at the end of src/**/*.{cpp,h,mm,gn}
  except src/tests/*
- Running git cl format --full to format the full contents of every
  changed file

Bug: none
Change-Id: Id88fc5ed0c5efbbc93b2c6a305c2f98465fe646d
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/24641
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>

src/common/Math.cpp

@@ -159,4 +159,4 @@ uint64_t RoundUp(uint64_t n, uint64_t m) {
     ASSERT(n > 0);
     ASSERT(m <= std::numeric_limits<uint64_t>::max() - n);
     return ((n + m - 1) / m) * m;
-}
+}