GTK: Create the start of a compatibility header wrapping deprecated methods.

content/browser/renderer_host/gtk_window_utils.cc

Index: content/browser/renderer_host/gtk_window_utils.cc
diff --git a/content/browser/renderer_host/gtk_window_utils.cc b/content/browser/renderer_host/gtk_window_utils.cc
index a574941b8f36858f6fb9f6d4a484358cbcf652c7..2c43d54c35a6261880498f893bf0fca205fc2956 100644
--- a/content/browser/renderer_host/gtk_window_utils.cc
+++ b/content/browser/renderer_host/gtk_window_utils.cc
@@ -7,6 +7,7 @@
 #include <gdk/gdkx.h>
 #include <gtk/gtk.h>
 
+#include "ui/base/gtk/gtk_compat.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebScreenInfo.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/x11/WebScreenInfoFactory.h"
 
@@ -14,7 +15,7 @@ namespace content {
 
 void GetScreenInfoFromNativeWindow(
     GdkWindow* gdk_window, WebKit::WebScreenInfo* results) {
-  GdkScreen* screen = gdk_drawable_get_screen(gdk_window);
+  GdkScreen* screen = gdk_window_get_screen(gdk_window);
   *results = WebKit::WebScreenInfoFactory::screenInfo(
       gdk_x11_drawable_get_xdisplay(gdk_window),
       gdk_x11_screen_get_screen_number(screen));