ozone: evdev: Allow setting slot values in EventDeviceInfo

ui/events/ozone/evdev/event_device_test_util.cc

 // Copyright 2015 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_device_test_util.h"
 
 #include "base/format_macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
@@ skipping 387 matching lines @@
   std::vector<unsigned long> prop_bits;
   if (!ParseBitfield(capabilities.prop, INPUT_PROP_CNT, &prop_bits))
     return false;
   devinfo->SetProps(&prop_bits[0], prop_bits.size());
 
   for (size_t i = 0; i < capabilities.abs_axis_count; ++i) {
     const DeviceAbsoluteAxis& axis = capabilities.abs_axis[i];
     devinfo->SetAbsInfo(axis.code, axis.absinfo);
   }
 
+  size_t slots = devinfo->GetAbsMtSlotCount();
+  std::vector<int32_t> zero_slots(slots, 0);
+  std::vector<int32_t> minus_one_slots(slots, -1);
+  for (int code = EVDEV_ABS_MT_FIRST; code <= EVDEV_ABS_MT_LAST; ++code) {
+    if (!devinfo->HasAbsEvent(code))
+      continue;
+    if (code == ABS_MT_TRACKING_ID)
+      devinfo->SetAbsMtSlots(code, minus_one_slots);
+    else
+      devinfo->SetAbsMtSlots(code, zero_slots);
+  }
+
   return true;
 }
 
 }  // namespace ui