Revert of Add POINTER_TYPE_ERASER to EventPointerType

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 67 matching lines @@
   }
 }
 
 ui::PointerDetails GetEventPointerDetails(
     const ui::InProgressTouchEvdev& event) {
   ui::EventPointerType type;
   switch (event.tool_code) {
     case BTN_TOOL_PEN:
       type = ui::EventPointerType::POINTER_TYPE_PEN;
       break;
-    case BTN_TOOL_RUBBER:
-      type = ui::EventPointerType::POINTER_TYPE_ERASER;
-      break;
     default:
       type = ui::EventPointerType::POINTER_TYPE_TOUCH;
   }
   return ui::PointerDetails(type, event.radius_x, event.radius_y,
                             event.pressure,
                             /* tilt_x */ 0.0f,
                             /* tilt_y */ 0.0f);
 }
 
 const int kTrackingIdForUnusedSlot = -1;
@@ skipping 225 matching lines @@
           event.value ? NextTrackingId() : kTrackingIdForUnusedSlot;
       ProcessMultitouchEvent(emulated_event);
     }
   }
 }
 
 void TouchEventConverterEvdev::ProcessKey(const input_event& input) {
   switch (input.code) {
     case BTN_TOUCH:
     case BTN_LEFT:
-    case BTN_0:
       events_[current_slot_].btn_left.down = input.value;
       events_[current_slot_].btn_left.changed = true;
       break;
     case BTN_STYLUS:
       events_[current_slot_].btn_right.down = input.value;
       events_[current_slot_].btn_right.changed = true;
       break;
     case BTN_STYLUS2:
       events_[current_slot_].btn_middle.down = input.value;
       events_[current_slot_].btn_middle.changed = true;
       break;
     case BTN_TOOL_PEN:
-    case BTN_TOOL_RUBBER:
       // Do not change tool types while touching to prevent inconsistencies
       // from switching between Mouse and TouchEvents.
       if (events_[current_slot_].was_touching)
         break;
 
       if (input.value > 0) {
         events_[current_slot_].tool_code = input.code;
       } else {
         events_[current_slot_].tool_code = 0;
       }
@@ skipping 186 matching lines @@
   if (pressure_max_ - pressure_min_)
     pressure /= pressure_max_ - pressure_min_;
   return pressure;
 }
 
 int TouchEventConverterEvdev::NextTrackingId() {
   return next_tracking_id_++ & kMaxTrackingId;
 }
 
 }  // namespace ui