content: Make ifdefs match with where this is used

content/browser/renderer_host/gtk_window_utils.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/browser/renderer_host/gtk_window_utils.h"
+
+#include <gdk/gdkx.h>
+#include <gtk/gtk.h>
+
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebScreenInfo.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/x11/WebScreenInfoFactory.h"
+
+namespace content {
+
+void GetScreenInfoFromNativeWindow(
+    GdkWindow* gdk_window, WebKit::WebScreenInfo* results) {
+  GdkScreen* screen = gdk_drawable_get_screen(gdk_window);
+  *results = WebKit::WebScreenInfoFactory::screenInfo(
+      gdk_x11_drawable_get_xdisplay(gdk_window),
+      gdk_x11_screen_get_screen_number(screen));
+
+  // TODO(tony): We should move this code into WebScreenInfoFactory.
+  int monitor_number = gdk_screen_get_monitor_at_window(screen, gdk_window);
+  GdkRectangle monitor_rect;
+  gdk_screen_get_monitor_geometry(screen, monitor_number, &monitor_rect);
+  results->rect = WebKit::WebRect(monitor_rect.x, monitor_rect.y,
+                                  monitor_rect.width, monitor_rect.height);
+  // TODO(tony): Should we query _NET_WORKAREA to get the workarea?
+  results->availableRect = results->rect;
+}
+
+}  // namespace content