Reland of [Ozone] Properly initialize multitouch slot values

ui/events/ozone/evdev/touch_event_converter_evdev.cc

Index: ui/events/ozone/evdev/touch_event_converter_evdev.cc
diff --git a/ui/events/ozone/evdev/touch_event_converter_evdev.cc b/ui/events/ozone/evdev/touch_event_converter_evdev.cc
index c3fc7e2c275166e4d12f0c0fc69120ad335b3670..ef087a1a6534a0551dbca7ffc4c60e3eaf56def7 100644
--- a/ui/events/ozone/evdev/touch_event_converter_evdev.cc
+++ b/ui/events/ozone/evdev/touch_event_converter_evdev.cc
@@ -72,6 +72,17 @@ float TuxelToPixelSize(float val, float num_tuxels, float num_pixels) {
 
 namespace ui {
 
+TouchEventConverterEvdev::InProgressEvents::InProgressEvents()
+    : x_(0),
+      y_(0),
+      id_(-1),
+      finger_(-1),
+      type_(ET_UNKNOWN),
+      radius_x_(0),
+      radius_y_(0),
+      pressure_(0) {
+}
+
 TouchEventConverterEvdev::TouchEventConverterEvdev(
     int fd,
     base::FilePath path,
@@ -129,6 +140,19 @@ void TouchEventConverterEvdev::Init(const EventDeviceInfo& info) {
                                 cal.bezel_right,
                                 cal.bezel_top,
                                 cal.bezel_bottom);
+
+  for (int i = 0;
+       i < std::min<int>(info.GetAbsMaximum(ABS_MT_SLOT) + 1, MAX_FINGERS);
+       ++i) {
+    events_[i].finger_ = info.GetSlotValue(ABS_MT_TRACKING_ID, i);
+    events_[i].type_ =
+        events_[i].finger_ < 0 ? ET_TOUCH_RELEASED : ET_TOUCH_PRESSED;
+    events_[i].x_ = info.GetSlotValue(ABS_MT_POSITION_X, i);
+    events_[i].y_ = info.GetSlotValue(ABS_MT_POSITION_Y, i);
+    events_[i].radius_x_ = info.GetSlotValue(ABS_MT_TOUCH_MAJOR, i);
+    events_[i].radius_y_ = info.GetSlotValue(ABS_MT_TOUCH_MINOR, i);
+    events_[i].pressure_ = info.GetSlotValue(ABS_MT_PRESSURE, i);
+  }
 }
 
 bool TouchEventConverterEvdev::Reinitialize() {