touch: Change how touch-screen capability is processed.

ui/events/devices/x11/touch_factory_x11.h

 // Copyright (c) 2012 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_EVENTS_DEVICES_X11_TOUCH_FACTORY_X11_H_
 #define UI_EVENTS_DEVICES_X11_TOUCH_FACTORY_X11_H_
 
 #include <bitset>
 #include <map>
 #include <set>
@@ skipping 64 matching lines @@
   void ReleaseSlotForTrackingID(uint32 tracking_id);
 
   // Whether any touch device is currently present and enabled.
   bool IsTouchDevicePresent();
 
   // Pairs of <vendor id, product id> of external touch screens.
   const std::set<std::pair<int, int> >& GetTouchscreenIds() const {
     return touchscreen_ids_;
   }
 
-  // Return maximum simultaneous touch points supported by device.
-  int GetMaxTouchPoints() const;
-
   // Resets the TouchFactory singleton.
   void ResetForTest();
 
   // Sets up the device id in the list |devices| as multi-touch capable
   // devices and enables touch events processing. This function is only
   // for test purpose, and it does not query from X server.
   void SetTouchDeviceForTest(const std::vector<unsigned int>& devices);
 
   // Sets up the device id in the list |devices| as pointer devices.
   // This function is only for test purpose, and it does not query from
@@ skipping 32 matching lines @@
   // capable.
   std::map<int, bool> touch_device_list_;
 
   // Touch screen <vid, pid>s.
   std::set<std::pair<int, int> > touchscreen_ids_;
 
   // Maps from a tracking id to the number of times |ReleaseSlotForTrackingID|
   // must be called before the tracking id is released.
   std::map<uint32, int> tracking_id_refcounts_;
 
-  // Maximum simultaneous touch points supported by device. In the case of
-  // devices with multiple digitizers (e.g. multiple touchscreens), the value
-  // is the maximum of the set of maximum supported contacts by each individual
-  // digitizer.
-  int max_touch_points_;
-
   // Device ID of the virtual core keyboard.
   int virtual_core_keyboard_device_;
 
   SequentialIDGenerator id_generator_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchFactory);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_DEVICES_X11_TOUCH_FACTORY_X11_H_