Remove support for type A touchscreens from TouchEventConverterEvdev

ui/events/ozone/evdev/touch_event_converter_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/touch_event_converter_evdev.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/input.h>
 #include <poll.h>
@@ skipping 62 matching lines @@
 
 TouchEventConverterEvdev::TouchEventConverterEvdev(
     int fd,
     base::FilePath path,
     int id,
     InputDeviceType type,
     DeviceEventDispatcherEvdev* dispatcher)
     : EventConverterEvdev(fd, path, id, type),
       dispatcher_(dispatcher),
       syn_dropped_(false),
-      is_type_a_(false),
       touch_points_(0),
       current_slot_(0) {
 }
 
 TouchEventConverterEvdev::~TouchEventConverterEvdev() {
   Stop();
   close(fd_);
 }
 
 void TouchEventConverterEvdev::Initialize(const EventDeviceInfo& info) {
@@ skipping 154 matching lines @@
         if (Reinitialize()) {
           syn_dropped_ = false;
           for(InProgressEvents& event: events_)
             event.altered_ = false;
         } else {
           LOG(ERROR) << "failed to re-initialize device info";
         }
       } else {
         ReportEvents(EventConverterEvdev::TimeDeltaFromInputEvent(input));
       }
-      if (is_type_a_)
-        current_slot_ = 0;
-      break;
-    case SYN_MT_REPORT:
-      // For type A devices, we just get a stream of all current contacts,
-      // in some arbitrary order.
-      events_[current_slot_].type_ = ET_TOUCH_PRESSED;
-      if (events_.size() - 1 > current_slot_)
-        current_slot_++;
-      is_type_a_ = true;
       break;
     case SYN_DROPPED:
       // Some buffer has overrun. We ignore all events up to and
       // including the next SYN_REPORT.
       syn_dropped_ = true;
       break;
     default:
       NOTIMPLEMENTED() << "invalid code for EV_SYN: " << input.code;
   }
 }
@@ skipping 14 matching lines @@
 
       // Subsequent events for this finger will be touch-move until it
       // is released.
       events_[i].type_ = ET_TOUCH_MOVED;
       events_[i].altered_ = false;
     }
   }
 }
 
 }  // namespace ui