CSS Media Query now reports touch-support accurately for Windows (retry)

ui/base/touch/touch_device_win.cc

Index: ui/base/touch/touch_device_win.cc
diff --git a/ui/base/touch/touch_device_win.cc b/ui/base/touch/touch_device_win.cc
new file mode 100644
index 0000000000000000000000000000000000000000..cfcd4b7681f5651a0e28d5fa27cde701833e294d
--- /dev/null
+++ b/ui/base/touch/touch_device_win.cc
@@ -0,0 +1,15 @@
+#include "ui/base/touch/touch_device_win.h"
+#include "base/win/windows_version.h"
+#include <windows.h>
+
+namespace ui {
+namespace base {
+
+bool IsTouchDevicePresent() {
+  // Docs: http://msdn.microsoft.com/en-us/library/dd371581(VS.85).aspx
+  return (::base::win::GetVersion() >= ::base::win::VERSION_WIN7) &&
+      (::GetSystemMetrics(SM_DIGITIZER) > 0);
+}
+
+}  // namespace base
+}  // namespace ui