--- chrome/browser/views/tabs/tab_strip.h
+++ chrome/browser/views/tabs/tab_strip.h
@@ -20,7 +20,7 @@ class TabStripModel;
 
 namespace views {
 class ImageView;
-#if defined(OS_LINUX)
+#if defined(USE_X11)
 class WidgetGtk;
 #elif defined(OS_WIN)
 class WidgetWin;
diff --git chrome/browser/zygote_host_linux.cc chrome/browser/zygote_host_linux.cc
index 9344f28..42dea8f 100644