Move DisplayUtils methods into gfx::Screen.

ui/gfx/screen_win.cc

Index: ui/gfx/screen_win.cc
diff --git a/ui/gfx/screen_win.cc b/ui/gfx/screen_win.cc
index 530cebee13fa6611c9f695269ba13fbfcc149a5c..2873b72114d35ea9ae74086e2a10d7a3398df433 100644
--- a/ui/gfx/screen_win.cc
+++ b/ui/gfx/screen_win.cc
@@ -54,9 +54,21 @@ gfx::Rect Screen::GetMonitorAreaNearestPoint(const gfx::Point& point) {
   return GetMonitorAreaOrWorkAreaNearestPoint(point, false);
 }
 
+// static
 gfx::NativeWindow Screen::GetWindowAtCursorScreenPoint() {
   POINT location;
   return GetCursorPos(&location) ? WindowFromPoint(location) : NULL;
 }
 
+// static
+gfx::Size Screen::GetPrimaryMonitorSize() {
+  return gfx::Size(GetSystemMetrics(SM_CXSCREEN),
+                   GetSystemMetrics(SM_CYSCREEN));
+}
+
+// static
+int Screen::GetNumMonitors() {
+  return GetSystemMetrics(SM_CMONITORS);
+}
+
 }  // namespace gfx