ozone: evdev: Fix possibility of stuck keys

ui/events/ozone/evdev/event_converter_evdev_impl.h

Index: ui/events/ozone/evdev/event_converter_evdev_impl.h
diff --git a/ui/events/ozone/evdev/event_converter_evdev_impl.h b/ui/events/ozone/evdev/event_converter_evdev_impl.h
index 76e867472a7bfd7ecf66c0fcd62c81116c51775f..b1277f53f2e41c8c48e82f0c625e35cd25ed8aaa 100644
--- a/ui/events/ozone/evdev/event_converter_evdev_impl.h
+++ b/ui/events/ozone/evdev/event_converter_evdev_impl.h
@@ -44,14 +44,18 @@ class EVENTS_OZONE_EVDEV_EXPORT EventConverterEvdevImpl
   bool HasCapsLockLed() const override;
   void SetAllowedKeys(scoped_ptr<std::set<DomCode>> allowed_keys) override;
   void AllowAllKeys() override;
+  void OnStopped() override;
 
   void ProcessEvents(const struct input_event* inputs, int count);
 
  private:
   void ConvertKeyEvent(const input_event& input);
-
   void ConvertMouseMoveEvent(const input_event& input);
-
+  void OnKeyChange(unsigned int key,
+                   bool down,
+                   const base::TimeDelta& timestamp);
+  void ReleaseKeys();
+  void OnLostSync();
   void DispatchMouseButton(const input_event& input);
 
   // Flush events delimited by EV_SYN. This is useful for handling
@@ -78,6 +82,9 @@ class EVENTS_OZONE_EVDEV_EXPORT EventConverterEvdevImpl
   // processed.
   scoped_ptr<std::set<DomCode>> allowed_keys_;
 
+  // Pressed keys bitset.
+  std::bitset<KEY_CNT> key_state_;
+
   // Shared cursor state.
   CursorDelegateEvdev* cursor_;