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

content/renderer/renderer_main.cc

Index: content/renderer/renderer_main.cc
diff --git a/content/renderer/renderer_main.cc b/content/renderer/renderer_main.cc
index 2551e145b827d9568d31b827b6105272b8713a17..9ce70b516422e3d534d1c19d34c878d244788e75 100644
--- a/content/renderer/renderer_main.cc
+++ b/content/renderer/renderer_main.cc
@@ -207,7 +207,7 @@ int RendererMain(const MainFunctionParams& parameters) {
   PepperPluginRegistry::GetInstance();
 
   {
-#if !defined(OS_LINUX)
+#if defined(OS_WIN) || defined(OS_MACOSX)
     // TODO(markus): Check if it is OK to unconditionally move this
     // instruction down.
     RenderProcessImpl render_process;
@@ -219,7 +219,7 @@ int RendererMain(const MainFunctionParams& parameters) {
     } else {
       LOG(ERROR) << "Running without renderer sandbox";
     }
-#if defined(OS_LINUX)
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
     RenderProcessImpl render_process;
     render_process.set_main_thread(new RenderThread());
 #endif