Move DisplayUtils methods into gfx::Screen.

ui/gfx/screen_gtk.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 "ui/gfx/screen.h"
 
 #include <gdk/gdkx.h>
 #include <gtk/gtk.h>
 
 #include "base/logging.h"
@@ skipping 45 matching lines @@
 
 // static
 gfx::Rect Screen::GetMonitorAreaNearestPoint(const gfx::Point& point) {
   GdkScreen* screen = gdk_screen_get_default();
   gint monitor = gdk_screen_get_monitor_at_point(screen, point.x(), point.y());
   GdkRectangle bounds;
   gdk_screen_get_monitor_geometry(screen, monitor, &bounds);
   return gfx::Rect(bounds);
 }
 
+// static
 gfx::NativeWindow Screen::GetWindowAtCursorScreenPoint() {
   GdkWindow* window = gdk_window_at_pointer(NULL, NULL);
   if (!window)
     return NULL;
 
   gpointer data = NULL;
   gdk_window_get_user_data(window, &data);
   GtkWidget* widget = reinterpret_cast<GtkWidget*>(data);
   if (!widget)
     return NULL;
   widget = gtk_widget_get_toplevel(widget);
   return GTK_IS_WINDOW(widget) ? GTK_WINDOW(widget) : NULL;
 }
 
+// static
+gfx::Size Screen::GetPrimaryMonitorSize() {
+  GdkScreen* screen = gdk_screen_get_default();
+  return gfx::Size(gdk_screen_get_width(screen), gdk_screen_get_height(screen));
+}
+
+// static
+int Screen::GetNumMonitors() {
+  // This query is kinda bogus for Linux -- do we want number of X screens?
+  // The number of monitors Xinerama has?  We'll just use whatever GDK uses.
+  GdkScreen* screen = gdk_screen_get_default();
+  return gdk_screen_get_n_monitors(screen);
+}
+
 }  // namespace gfx