Remove IPC::ParamTraits for ui::Event.

ui/events/event.h

Index: ui/events/event.h
diff --git a/ui/events/event.h b/ui/events/event.h
index 114d73ad320cd7fdfe2753c397b0669f8c4a4f9e..17d3bcca7f99b5727dbb07942c9bb9510c7b6ddc 100644
--- a/ui/events/event.h
+++ b/ui/events/event.h
@@ -28,10 +28,6 @@ namespace gfx {
 class Transform;
 }
 
-namespace IPC {
-template <class P> struct ParamTraits;
-}
-
 namespace ui {
 class EventTarget;
 class KeyEvent;
@@ -297,9 +293,6 @@ class EVENTS_EXPORT Event {
  private:
   friend class EventTestApi;
 
-  // For (de)serialization.
-  friend struct IPC::ParamTraits<ui::ScopedEvent>;
-
   EventType type_;
   std::string name_;
   base::TimeDelta time_stamp_;
@@ -321,13 +314,6 @@ class EVENTS_EXPORT CancelModeEvent : public Event {
  public:
   CancelModeEvent();
   ~CancelModeEvent() override;
-
- private:
-  // For (de)serialization.
-  CancelModeEvent(EventType type, base::TimeDelta time_stamp, int flags)
-      : Event(type, time_stamp, flags) {}
-  friend struct IPC::ParamTraits<ui::ScopedEvent>;
-  friend struct IPC::ParamTraits<ui::CancelModeEvent>;
 };
 
 class EVENTS_EXPORT LocatedEvent : public Event {
@@ -372,12 +358,6 @@ class EVENTS_EXPORT LocatedEvent : public Event {
  protected:
   friend class LocatedEventTestApi;
 
-  // For (de)serialization.
-  LocatedEvent(EventType type, base::TimeDelta time_stamp, int flags)
-      : Event(type, time_stamp, flags) {}
-  friend struct IPC::ParamTraits<ui::ScopedEvent>;
-  friend struct IPC::ParamTraits<ui::LocatedEvent>;
-
   explicit LocatedEvent(const base::NativeEvent& native_event);
 
   // Create a new LocatedEvent which is identical to the provided model.
@@ -438,9 +418,6 @@ struct EVENTS_EXPORT PointerDetails {
            tilt_y == other.tilt_y;
   }
 
-  // For serialization.
-  friend struct IPC::ParamTraits<ui::PointerDetails>;
-
   // The type of pointer device.
   EventPointerType pointer_type = EventPointerType::POINTER_TYPE_UNKNOWN;
 
@@ -563,13 +540,6 @@ class EVENTS_EXPORT MouseEvent : public LocatedEvent {
     pointer_details_ = details;
   }
 
- protected:
-  // For (de)serialization.
-  MouseEvent(EventType type, base::TimeDelta time_stamp, int flags)
-      : LocatedEvent(type, time_stamp, flags) {}
-  friend struct IPC::ParamTraits<ui::ScopedEvent>;
-  friend struct IPC::ParamTraits<ui::MouseEvent>;
-
  private:
   FRIEND_TEST_ALL_PREFIXES(EventTest, DoubleClickRequiresRelease);
   FRIEND_TEST_ALL_PREFIXES(EventTest, SingleClickRightLeft);
@@ -630,12 +600,6 @@ class EVENTS_EXPORT MouseWheelEvent : public MouseEvent {
   const gfx::Vector2d& offset() const { return offset_; }
 
  private:
-  // For (de)serialization.
-  MouseWheelEvent(EventType type, base::TimeDelta time_stamp, int flags)
-      : MouseEvent(type, time_stamp, flags) {}
-  friend struct IPC::ParamTraits<ui::ScopedEvent>;
-  friend struct IPC::ParamTraits<ui::MouseWheelEvent>;
-
   gfx::Vector2d offset_;
 };
 
@@ -711,13 +675,6 @@ class EVENTS_EXPORT TouchEvent : public LocatedEvent {
   }
 
  private:
-  // For (de)serialization.
-  TouchEvent(EventType type, base::TimeDelta time_stamp, int flags)
-      : LocatedEvent(type, time_stamp, flags),
-        should_remove_native_touch_id_mapping_(false) {}
-  friend struct IPC::ParamTraits<ui::ScopedEvent>;
-  friend struct IPC::ParamTraits<ui::TouchEvent>;
-
   // Adjusts rotation_angle_ to within the acceptable range.
   void FixRotationAngle();
 
@@ -771,13 +728,6 @@ class EVENTS_EXPORT PointerEvent : public LocatedEvent {
   int32_t pointer_id() const { return pointer_id_; }
   const PointerDetails& pointer_details() const { return details_; }
 
- protected:
-  // For (de)serialization.
-  PointerEvent(EventType type, base::TimeDelta time_stamp, int flags)
-      : LocatedEvent(type, time_stamp, flags) {}
-  friend struct IPC::ParamTraits<ui::ScopedEvent>;
-  friend struct IPC::ParamTraits<ui::PointerEvent>;
-
  private:
   int32_t pointer_id_;
   PointerDetails details_;
@@ -948,11 +898,6 @@ class EVENTS_EXPORT KeyEvent : public Event {
   void set_is_char(bool is_char) { is_char_ = is_char; }
 
  private:
-  // For (de)serialization.
-  KeyEvent(EventType type, base::TimeDelta time_stamp, int flags);
-  friend struct IPC::ParamTraits<ui::ScopedEvent>;
-  friend struct IPC::ParamTraits<ui::KeyEvent>;
-
   // Determine key_ on a keystroke event from code_ and flags().
   void ApplyLayout() const;
 
@@ -1031,12 +976,6 @@ class EVENTS_EXPORT ScrollEvent : public MouseEvent {
   int finger_count() const { return finger_count_; }
 
  private:
-  // For (de)serialization.
-  ScrollEvent(EventType type, base::TimeDelta time_stamp, int flags)
-      : MouseEvent(type, time_stamp, flags) {}
-  friend struct IPC::ParamTraits<ui::ScopedEvent>;
-  friend struct IPC::ParamTraits<ui::ScrollEvent>;
-
   // Potential accelerated offsets.
   float x_offset_;
   float y_offset_;
@@ -1069,12 +1008,6 @@ class EVENTS_EXPORT GestureEvent : public LocatedEvent {
   const GestureEventDetails& details() const { return details_; }
 
  private:
-  // For (de)serialization.
-  GestureEvent(EventType type, base::TimeDelta time_stamp, int flags)
-      : LocatedEvent(type, time_stamp, flags) {}
-  friend struct IPC::ParamTraits<ui::ScopedEvent>;
-  friend struct IPC::ParamTraits<ui::GestureEvent>;
-
   GestureEventDetails details_;
 };