Wrap calls to GetTouchInputInfo

ui/base/win/touch_input.h

Index: ui/base/win/touch_input.h
diff --git a/ui/base/win/touch_input.h b/ui/base/win/touch_input.h
new file mode 100644
index 0000000000000000000000000000000000000000..cf2acb87fd4d2c2bb9796b05e2572e18111d2d22
--- /dev/null
+++ b/ui/base/win/touch_input.h
@@ -0,0 +1,23 @@
+// Copyright (c) 2013 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.
+
+#ifndef UI_BASE_WIN_TOUCH_INPUT_H_
+#define UI_BASE_WIN_TOUCH_INPUT_H_
+
+#include <windows.h>
+
+#include "ui/base/ui_export.h"
+
+namespace ui {
+
+// Wrapper for GetTouchInputInfo, which is not defined before Win7. For
+// earlier OS's, this function returns FALSE.
+UI_EXPORT BOOL GetTouchInputInfoWrapper(HTOUCHINPUT handle,
+                                        UINT count,
+                                        PTOUCHINPUT pointer,
+                                        int size);
+
+}  // namespace ui
+
+#endif  // UI_BASE_WIN_TOUCH_INPUT_H_