Disable touch calibration on external touchscreen.

ui/base/events/event.h

Index: ui/base/events/event.h
diff --git a/ui/base/events/event.h b/ui/base/events/event.h
index b691118c064954ffd7b74149ad0541340fdaec1a..b498824207923a5a45c048f1dc6284324c32ebd6 100644
--- a/ui/base/events/event.h
+++ b/ui/base/events/event.h
@@ -9,6 +9,7 @@
 #include "base/compiler_specific.h"
 #include "base/event_types.h"
 #include "base/logging.h"
+#include "base/memory/singleton.h"
 #include "base/time.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
 #include "ui/base/events/event_constants.h"
@@ -438,6 +439,25 @@ class UI_EXPORT MouseWheelEvent : public MouseEvent {
   DISALLOW_COPY_AND_ASSIGN(MouseWheelEvent);
 };
 
+#if defined(USE_XI2_MT)
+class TouchCoordinatesCalibrator {

[sadrul, 2013/02/04 19:10:22]

Add doc

[ynovikov, 2013/03/13 23:34:21]

Done.

+public:
+  static TouchCoordinatesCalibrator* GetInstance();
+  void Calibrate(TouchEvent& event, const gfx::Rect& bounds);

[sadrul, 2013/02/04 19:10:22]

You should either use a const ref, or a pointer.

Also, add doc.

[ynovikov, 2013/03/13 23:34:21]

Done.

+private:
+  TouchCoordinatesCalibrator();
+  friend struct DefaultSingletonTraits<TouchCoordinatesCalibrator>;
+
+  // The (positive) calibration values for the four border sides.
+  int left_border_touch_calibration;

[sadrul, 2013/02/04 19:10:22]

You can probably just call these left_, right_, top_ and bottom_

[ynovikov, 2013/03/13 23:34:21]

Done.

+  int right_border_touch_calibration;
+  int top_border_touch_calibration;
+  int bottom_border_touch_calibration;
+
+  DISALLOW_COPY_AND_ASSIGN(TouchCoordinatesCalibrator);
+};
+#endif
+
 class UI_EXPORT TouchEvent : public LocatedEvent {
  public:
   explicit TouchEvent(const base::NativeEvent& native_event);
@@ -483,6 +503,10 @@ class UI_EXPORT TouchEvent : public LocatedEvent {
   // and it needs to be mapped into Aura Root Window coordinates.
   void Relocate(const gfx::Point& origin);
 
+#if defined(USE_XI2_MT)
+  void Calibrate(const gfx::Rect& bounds);
+#endif
+
   // Used for unit tests.
   void set_radius_x(const float r) { radius_x_ = r; }
   void set_radius_y(const float r) { radius_y_ = r; }