Chromium side of maxTouchPoints implementation.

ui/base/touch/touch_device.h

Index: ui/base/touch/touch_device.h
diff --git a/ui/base/touch/touch_device.h b/ui/base/touch/touch_device.h
index 8cc4b7d615ddc09ebef3f30ba2d8f5816aba42c9..19acf383f7a909bf1b6cbd82c72d7c1bb5e5cfb9 100644
--- a/ui/base/touch/touch_device.h
+++ b/ui/base/touch/touch_device.h
@@ -7,11 +7,18 @@
 
 #include "ui/base/ui_export.h"
 
+// TODO(sblom): This is non-standard, and should be removed before
+// RuntimeEnabledFlags::PointerEventsMaxTouchPoints is marked stable.
+// Tracked by: http://crbug.com/308649
+const int kMaxTouchPointsUnknown = -1;

[sadrul, 2013/10/21 02:27:22]

This should be inside the ui namespace.

+
 namespace ui {
 
 // Returns true if a touch device is available.
 UI_EXPORT bool IsTouchDevicePresent();
 
+UI_EXPORT int MaxTouchPoints();

[sadrul, 2013/10/21 02:27:22]

Add a doc comment.

There can be multiple touch devices in use at the same time (e.g. an external
touch-screen attached to a pixel device). Does this function add up the
max-touch points for each touch-device? Please include this in the doc comment.

+
 }  // namespace ui
 
 #endif  // UI_BASE_TOUCH_TOUCH_DEVICE_H_