Reland of [Ozone] Properly initialize multitouch slot values

ui/events/ozone/evdev/touch_event_converter_evdev.h

 // 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.
 
 #ifndef UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_
 #define UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_
 
 #include <bitset>
 
 #include "base/compiler_specific.h"
@@ skipping 75 matching lines @@
   gfx::Size native_size_;
 
   // Touch point currently being updated from the /dev/input/event* stream.
   int current_slot_;
 
   // Bit field tracking which in-progress touch points have been modified
   // without a syn event.
   std::bitset<MAX_FINGERS> altered_slots_;
 
   struct InProgressEvents {
+    InProgressEvents();
+
     float x_;
     float y_;
     int id_;  // Device reported "unique" touch point id; -1 means not active
     int finger_;  // "Finger" id starting from 0; -1 means not active
 
     EventType type_;
     float radius_x_;
     float radius_y_;
     float pressure_;
   };
 
   // In-progress touch points.
   InProgressEvents events_[MAX_FINGERS];
 
   DISALLOW_COPY_AND_ASSIGN(TouchEventConverterEvdev);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_