3 files changed, 4 insertions, 8 deletions
diff --git a/widget/BasicEvents.h b/widget/BasicEvents.h
index 4e9e0e6cea..0ce0f587dd 100644
--- a/widget/BasicEvents.h
+++ b/widget/BasicEvents.h
@@ -423,6 +423,9 @@ public:
   nsCOMPtr<dom::EventTarget> mCurrentTarget;
   nsCOMPtr<dom::EventTarget> mOriginalTarget;
 
+  /// The possible related target
+  nsCOMPtr<dom::EventTarget> mRelatedTarget;
+
   nsTArray<EventTargetChainItem>* mPath;
 
   dom::EventTarget* GetDOMEventTarget() const;
@@ -442,6 +445,7 @@ public:
     mTarget = aCopyTargets ? aEvent.mTarget : nullptr;
     mCurrentTarget = aCopyTargets ? aEvent.mCurrentTarget : nullptr;
     mOriginalTarget = aCopyTargets ? aEvent.mOriginalTarget : nullptr;
+    mRelatedTarget = aCopyTargets ? aEvent.mRelatedTarget : nullptr;
   }
 
   /**
diff --git a/widget/ContentEvents.h b/widget/ContentEvents.h
index be64b7bebd..09d4d9928c 100644
--- a/widget/ContentEvents.h
+++ b/widget/ContentEvents.h
@@ -212,9 +212,6 @@ public:
     return result;
   }
 
-  /// The possible related target
-  nsCOMPtr<dom::EventTarget> mRelatedTarget;
-
   bool mFromRaise;
   bool mIsRefocus;
 
@@ -222,7 +219,6 @@ public:
   {
     AssignUIEventData(aEvent, aCopyTargets);
 
-    mRelatedTarget = aCopyTargets ? aEvent.mRelatedTarget : nullptr;
     mFromRaise = aEvent.mFromRaise;
     mIsRefocus = aEvent.mIsRefocus;
   }
diff --git a/widget/MouseEvents.h b/widget/MouseEvents.h
index 442ac41e82..4b8ff44ce6 100644
--- a/widget/MouseEvents.h
+++ b/widget/MouseEvents.h
@@ -110,9 +110,6 @@ public:
     MOZ_CRASH("WidgetMouseEventBase must not be most-subclass");
   }
 
-  /// The possible related target
-  nsCOMPtr<nsISupports> relatedTarget;
-
   enum buttonType
   {
     eLeftButton   = 0,
@@ -162,7 +159,6 @@ public:
   {
     AssignInputEventData(aEvent, aCopyTargets);
 
-    relatedTarget = aCopyTargets ? aEvent.relatedTarget : nullptr;
     button = aEvent.button;
     buttons = aEvent.buttons;
     pressure = aEvent.pressure;