touch: Change how touch-screen capability is processed.

ui/events/ozone/evdev/event_factory_evdev.cc

 // Copyright 2014 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.
 
 #include "ui/events/ozone/evdev/event_factory_evdev.h"
 
 #include <fcntl.h>
 #include <linux/input.h>
 
 #include "base/debug/trace_event.h"
@@ skipping 311 matching lines @@
 
   if (converter.HasKeyboard())
     NotifyKeyboardsUpdated();
 }
 
 void EventFactoryEvdev::NotifyTouchscreensUpdated() {
   DeviceHotplugEventObserver* observer = DeviceDataManager::GetInstance();
   std::vector<TouchscreenDevice> touchscreens;
   for (auto it = converters_.begin(); it != converters_.end(); ++it) {
     if (it->second->HasTouchscreen()) {
+      // TODO(spang): Extract the number of touch-points supported by the
+      // device.
+      const int touch_points = 11;
       touchscreens.push_back(TouchscreenDevice(
           it->second->id(), it->second->type(), std::string() /* Device name */,
-          it->second->GetTouchscreenSize()));
+          it->second->GetTouchscreenSize(), touch_points));
     }
   }
 
   observer->OnTouchscreenDevicesUpdated(touchscreens);
 }
 
 void EventFactoryEvdev::NotifyKeyboardsUpdated() {
   DeviceHotplugEventObserver* observer = DeviceDataManager::GetInstance();
   std::vector<KeyboardDevice> keyboards;
   for (auto it = converters_.begin(); it != converters_.end(); ++it) {
@@ skipping 21 matching lines @@
   gesture_property_provider_->GetDeviceIdsByType(type, &ids);
 #endif
   // In the future we can add other device matching logics here.
 
   if (device_ids)
     device_ids->assign(ids.begin(), ids.end());
   return !ids.empty();
 }
 
 }  // namespace ui