Replace OS_LINUX ifdefs with OS_POSIX & !OS_MACOSX, TOOLKIT_USES_GTK, or

content/worker/worker_uitest.cc

Index: content/worker/worker_uitest.cc
diff --git a/content/worker/worker_uitest.cc b/content/worker/worker_uitest.cc
index 6099a05709abc7961c679f76eed39bb3f4f4bd22..369107279ab4aa535fcbfe8a445ecd6cb1ba1037 100644
--- a/content/worker/worker_uitest.cc
+++ b/content/worker/worker_uitest.cc
@@ -88,8 +88,8 @@ class WorkerTest : public UILayoutTest {
     // The 1 is for the browser process.
     int number_of_processes = 1 + workers +
         (ProxyLauncher::in_process_renderer() ? 0 : tabs);
-#if defined(OS_LINUX)
-    // On Linux, we also have a zygote process and a sandbox host process.
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
+    // On Unix, we also have a zygote process and a sandbox host process.
     number_of_processes += 2;
 #endif