Move touch CTM from X into Chrome

ui/events/x/device_data_manager.h

Index: ui/events/x/device_data_manager.h
diff --git a/ui/events/x/device_data_manager.h b/ui/events/x/device_data_manager.h
index aff064935718000d97f23a866178e0629fe4e810..d0e8f6a2203c5fb1ca12c9bc4bb723ccaa62f5ef 100644
--- a/ui/events/x/device_data_manager.h
+++ b/ui/events/x/device_data_manager.h
@@ -22,6 +22,7 @@
 #include "base/event_types.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/events_base_export.h"
+#include "ui/events/touch_ctm.h"
 #include "ui/gfx/x/x11_atom_cache.h"
 
 template <typename T> struct DefaultSingletonTraits;
@@ -215,6 +216,16 @@ class EVENTS_BASE_EXPORT DeviceDataManager {
                     double* min,
                     double* max);
 
+  void ClearTouchCTM();

[sadrul, 2014/03/15 19:32:51]

Use something more descriptive than CTM

[Yufeng Shen (Slow to review), 2014/04/29 20:34:18]

renamed to TouchTransformer.

+  void SetTouchCTM(int touch_device_id,
+                   const TouchCTM& touch_ctm);
+  void ApplyTouchCTM(int touch_device_id, float* x, float* y);
+
+  void ClearTouchDeviceToDisplayMap();

[sadrul, 2014/03/15 19:32:51]

We should have one 'Clear<...>' instead of two separate 'Clear<...>'s

[Yufeng Shen (Slow to review), 2014/04/29 20:34:18]

Done.

+  void MapTouchDeviceToDisplay(int touch_device_id, int64 display_id);
+  int64 GetDisplayForTouchDevice(int touch_device_id);
+
+
   // Sets up relevant valuator informations for device ids in the device lists.
   // This function is only for test purpose. It does not query the X server for
   // the actual device info, but rather inits the relevant valuator structures
@@ -292,6 +303,11 @@ class EVENTS_BASE_EXPORT DeviceDataManager {
   unsigned char button_map_[256];
   int button_map_count_;
 
+  // Table to keep track of which display id is mapped to which touch device.
+  int64 touch_device_to_display_map_[kMaxDeviceNum];
+  // Index table to find the TouchCTM for a touch device.
+  TouchCTM touch_device_ctm_map_[kMaxDeviceNum];
+
   DISALLOW_COPY_AND_ASSIGN(DeviceDataManager);
 };