Refactor OS_LINUX preprocessor directive for LaCrOS effort.

Currently, ChromeOS defines the OS_LINUX directive as well as
OS_CHROMEOS.  We're working to separate these two, so we're
making the fact that OS_LINUX == OS_LINUX || OS_CHROMEOS
explicit.

Bug: 1110266
Change-Id: I5a906f5fd11894d2a618daced64235e8af558cd0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2354835
Reviewed-by: Lei Zhang <[email protected]>
Commit-Queue: Sean McAllister <[email protected]>
Cr-Commit-Position: refs/heads/master@{#797905}
diff --git a/chrome/browser/renderer_preferences_util.cc b/chrome/browser/renderer_preferences_util.cc
index 8996948..0acace5 100644
--- a/chrome/browser/renderer_preferences_util.cc
+++ b/chrome/browser/renderer_preferences_util.cc
@@ -174,7 +174,8 @@
   }
 #endif
 
-#if defined(OS_LINUX) || defined(OS_ANDROID) || defined(OS_WIN)
+#if defined(OS_LINUX) || defined(OS_CHROMEOS) || defined(OS_ANDROID) || \
+    defined(OS_WIN)
   content::UpdateFontRendererPreferencesFromSystemSettings(prefs);
 #endif