Small fix for crrev.com/c/738858.

R=wez@chromium.org,rsesek@chromium.org
Bug: 772552

Change-Id: I666f2ae1ea4a423250b53715b2957d3a87165935
Reviewed-on: https://chromium-review.googlesource.com/787891Reviewed-by: Wez <wez@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Ken Rockot <rockot@chromium.org>
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520613}

chrome/app/chrome_main_delegate.cc

@@ -303,7 +303,7 @@ void AdjustLinuxOOMScore(const std::string& process_type) {
 // and resources loaded.
 bool SubprocessNeedsResourceBundle(const std::string& process_type) {
   return
-#if defined(OS_POSIX) && !defined(OS_MACOSX)
+#if defined(OS_LINUX)
       // The zygote process opens the resources for the renderers.
       process_type == switches::kZygoteProcess ||
 #endif