Update ChromiumOS branding in C++ styleguide

Change-Id: Ib719b352f42e80b66a7fbbb706905af23eca4cc7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3789169
Commit-Queue: Peter Kasting <[email protected]>
Auto-Submit: Tommy Chiang <[email protected]>
Reviewed-by: Peter Kasting <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1028787}
diff --git a/styleguide/c++/c++.md b/styleguide/c++/c++.md
index 5ae0684dc..0863235 100644
--- a/styleguide/c++/c++.md
+++ b/styleguide/c++/c++.md
@@ -274,8 +274,8 @@
   * There is no `(c)` after `Copyright`.
   * `$YEAR` should be set to the current year at the time a file is created, and
     not changed thereafter.
-  * For files specific to Chromium OS, replace the word Chromium with the phrase
-    Chromium OS.
+  * For files specific to ChromiumOS, replace the word Chromium with the phrase
+    ChromiumOS.
   * If the style changes, don't bother to update existing files to comply with
     the new style. For the same reason, don't just blindly copy an existing
     file's header when creating a new file, since the existing file may use an