Add palm suppression feature to EventConverterEvdev

ui/events/ozone/evdev/touch_event_converter_evdev.h

Index: ui/events/ozone/evdev/touch_event_converter_evdev.h
diff --git a/ui/events/ozone/evdev/touch_event_converter_evdev.h b/ui/events/ozone/evdev/touch_event_converter_evdev.h
index ccb60d7c1331b13939b3300e0887498da2a365d8..8a84649107ff0319741d117ac053c1765145c0de 100644
--- a/ui/events/ozone/evdev/touch_event_converter_evdev.h
+++ b/ui/events/ozone/evdev/touch_event_converter_evdev.h
@@ -28,11 +28,11 @@ class PointF;
 namespace ui {
 
 class DeviceEventDispatcherEvdev;
+class PalmSuppressionFilter;
 class TouchEvent;
 class TouchNoiseFinder;
 struct InProgressTouchEvdev;
 struct PointerDetails;
-
 class EVENTS_OZONE_EVDEV_EXPORT TouchEventConverterEvdev
     : public EventConverterEvdev {
  public:
@@ -45,10 +45,12 @@ class EVENTS_OZONE_EVDEV_EXPORT TouchEventConverterEvdev
 
   // EventConverterEvdev:
   bool HasTouchscreen() const override;
+  bool HasPen() const override;
   gfx::Size GetTouchscreenSize() const override;
   int GetTouchPoints() const override;
   void OnEnabled() override;
   void OnDisabled() override;
+  void SetPalmSuppressionFilter(PalmSuppressionFilter* palm_filter) override;
 
   void DumpTouchEventLog(const char* filename) override;
 
@@ -104,6 +106,9 @@ class EVENTS_OZONE_EVDEV_EXPORT TouchEventConverterEvdev
   // Device has multitouch capability.
   bool has_mt_ = false;
 
+  // Device has pen capability.
+  bool has_pen_ = false;
+
   // Use BTN_LEFT instead of BT_TOUCH.
   bool quirk_left_mouse_button_ = false;
 
@@ -140,6 +145,9 @@ class EVENTS_OZONE_EVDEV_EXPORT TouchEventConverterEvdev
   // Records the recent touch events. It is used to fill the feedback reports
   TouchEventLogEvdev touch_evdev_debug_buffer_;
 
+  // Decides whether events should be dropped for palm suppression.
+  PalmSuppressionFilter* palm_filter_;
+
   DISALLOW_COPY_AND_ASSIGN(TouchEventConverterEvdev);
 };