Include external touchscreen vid/pid in UMA hardware profile

ui/events/x/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_X_TOUCH_FACTORY_X11_H_
 #define UI_EVENTS_X_TOUCH_FACTORY_X11_H_
 
 #include <bitset>
 #include <map>
+#include <set>
+#include <utility>
 #include <vector>
 
 #include "base/timer/timer.h"
 #include "ui/events/events_base_export.h"
 #include "ui/gfx/sequential_id_generator.h"
 
 template <typename T> struct DefaultSingletonTraits;
 
 typedef unsigned long Cursor;
 typedef unsigned long Window;
@@ skipping 45 matching lines @@
   // Tries to find an existing slot ID mapping to tracking ID. If there
   // isn't one already, allocates a new slot ID and sets up the mapping.
   int GetSlotForTrackingID(uint32 tracking_id);
 
   // Releases the slot ID mapping to tracking ID.
   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;
 
   // 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
   // X server.
   void SetPointerDeviceForTest(const std::vector<unsigned int>& devices);
 
  private:
   // Requirement for Singleton
   friend struct DefaultSingletonTraits<TouchFactory>;
 
+  void CacheTouchscreenIds(Display* display, int id);
+
   // NOTE: To keep track of touch devices, we currently maintain a lookup table
   // to quickly decide if a device is a touch device or not. We also maintain a
   // list of the touch devices. Ideally, there will be only one touch device,
   // and instead of having the lookup table and the list, there will be a single
   // identifier for the touch device. This can be completed after enough testing
   // on real touch devices.
 
   static const int kMaxDeviceNum = 128;
 
   // A quick lookup table for determining if events from the pointer device
   // should be processed.
   std::bitset<kMaxDeviceNum> pointer_device_lookup_;
 
   // A quick lookup table for determining if a device is a touch device.
   std::bitset<kMaxDeviceNum> touch_device_lookup_;
 
   // Indicates whether a touch device is currently available or not.
   bool touch_device_available_;
 
   // Indicates whether touch events are explicitly disabled.
   bool touch_events_disabled_;
 
+  // Indicates whether the device's internal display produces touch events.
+  bool internal_display_supports_touch_;
+
   // The list of touch devices. For testing/debugging purposes, a single-pointer
   // device (mouse or touch screen without sufficient X/driver support for MT)
   // can sometimes be treated as a touch device. The key in the map represents
   // the device id, and the value represents if the device is multi-touch
   // capable.
   std::map<int, bool> touch_device_list_;
 
+  // Touch screen <vid, pid>s.
+  std::set<std::pair<int, int> > touchscreen_ids_;
+
   // 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_;
 
   SequentialIDGenerator id_generator_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchFactory);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_X_TOUCH_FACTORY_X11_H_