Put #include Windows.h in a separate block

There are many times when Windows.h must be included before other header
files, despite being alphabetically later. For instance, Windows must be
included before shellapi.h. In order to prevent clang-format from
undoing this ordering it is necessary to have a blank line in-between.
This change adds the necessary blank line and a simple explanatory
comment.

Change-Id: I494ced0b6c30dee4304491f923878e9d2b372e65
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4048781
Reviewed-by: Peter Boström <[email protected]>
Reviewed-by: Kyle Charbonneau <[email protected]>
Reviewed-by: Mark Mentovai <[email protected]>
Commit-Queue: Bruce Dawson <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1074821}
diff --git a/base/process/kill_win.cc b/base/process/kill_win.cc
index 63055a8..b572cfdf 100644
--- a/base/process/kill_win.cc
+++ b/base/process/kill_win.cc
@@ -7,6 +7,7 @@
 #include <algorithm>
 
 #include <windows.h>
+
 #include <io.h>
 #include <stdint.h>