diff --git a/layout/base/nsPresShell.cpp b/layout/base/nsPresShell.cpp
index 4ca00e01aff..678ac193978 100644
--- a/layout/base/nsPresShell.cpp
+++ b/layout/base/nsPresShell.cpp
@@ -6091,8 +6091,7 @@ PresShell::HandleEvent(nsIFrame* aFrame,
     if (aEvent->message == NS_KEY_DOWN) {
       mNoDelayedKeyEvents = true;
     } else if (!mNoDelayedKeyEvents) {
-      nsDelayedEvent* event =
-        new nsDelayedKeyEvent(aEvent->AsKeyboardEvent());
+      DelayedEvent* event = new DelayedKeyEvent(aEvent->AsKeyboardEvent());
       if (!mDelayedEvents.AppendElement(event)) {
         delete event;
       }
@@ -6313,7 +6312,7 @@ PresShell::HandleEvent(nsIFrame* aFrame,
       if (aEvent->message == NS_MOUSE_BUTTON_DOWN) {
         mNoDelayedMouseEvents = true;
       } else if (!mNoDelayedMouseEvents && aEvent->message == NS_MOUSE_BUTTON_UP) {
-        nsDelayedEvent* event = new nsDelayedMouseEvent(aEvent->AsMouseEvent());
+        DelayedEvent* event = new DelayedMouseEvent(aEvent->AsMouseEvent());
         if (!mDelayedEvents.AppendElement(event)) {
           delete event;
         }
@@ -7606,9 +7605,9 @@ PresShell::FireOrClearDelayedEvents(bool aFireEvents)
     nsCOMPtr<nsIDocument> doc = mDocument;
     while (!mIsDestroying && mDelayedEvents.Length() &&
            !doc->EventHandlingSuppressed()) {
-      nsAutoPtr<nsDelayedEvent> ev(mDelayedEvents[0].forget());
+      nsAutoPtr<DelayedEvent> ev(mDelayedEvents[0].forget());
       mDelayedEvents.RemoveElementAt(0);
-      ev->Dispatch(this);
+      ev->Dispatch();
     }
     if (!doc->EventHandlingSuppressed()) {
       mDelayedEvents.Clear();
@@ -8319,6 +8318,56 @@ nsIPresShell::RemovePostRefreshObserver(nsAPostRefreshObserver* aObserver)
 // End of protected and private methods on the PresShell
 //------------------------------------------------------
 
+//------------------------------------------------------------------
+//-- Delayed event Classes Impls
+//------------------------------------------------------------------
+
+PresShell::DelayedInputEvent::DelayedInputEvent() :
+  DelayedEvent(),
+  mEvent(nullptr)
+{
+}
+
+PresShell::DelayedInputEvent::~DelayedInputEvent()
+{
+  delete mEvent;
+}
+
+void
+PresShell::DelayedInputEvent::Dispatch()
+{
+  if (!mEvent || !mEvent->widget) {
+    return;
+  }
+  nsCOMPtr<nsIWidget> widget = mEvent->widget;
+  nsEventStatus status;
+  widget->DispatchEvent(mEvent, status);
+}
+
+PresShell::DelayedMouseEvent::DelayedMouseEvent(WidgetMouseEvent* aEvent) :
+  DelayedInputEvent()
+{
+  WidgetMouseEvent* mouseEvent =
+    new WidgetMouseEvent(aEvent->mFlags.mIsTrusted,
+                         aEvent->message,
+                         aEvent->widget,
+                         aEvent->reason,
+                         aEvent->context);
+  mouseEvent->AssignMouseEventData(*aEvent, false);
+  mEvent = mouseEvent;
+}
+
+PresShell::DelayedKeyEvent::DelayedKeyEvent(WidgetKeyboardEvent* aEvent) :
+  DelayedInputEvent()
+{
+  WidgetKeyboardEvent* keyEvent =
+    new WidgetKeyboardEvent(aEvent->mFlags.mIsTrusted,
+                            aEvent->message,
+                            aEvent->widget);
+  keyEvent->AssignKeyEventData(*aEvent, false);
+  mEvent = keyEvent;
+}
+
 // Start of DEBUG only code
 
 #ifdef DEBUG
diff --git a/layout/base/nsPresShell.h b/layout/base/nsPresShell.h
index dcb2af38cbc..47e901a34e6 100644
--- a/layout/base/nsPresShell.h
+++ b/layout/base/nsPresShell.h
@@ -34,9 +34,8 @@
 #include "nsContentUtils.h" // For AddScriptBlocker().
 #include "nsRefreshDriver.h"
 #include "mozilla/Attributes.h"
+#include "mozilla/EventForwards.h"
 #include "mozilla/MemoryReporting.h"
-#include "mozilla/MouseEvents.h"
-#include "mozilla/TextEvents.h"
 
 class nsRange;
 class nsIDragService;
@@ -547,67 +546,35 @@ protected:
     return rv;
   }
 
-  class nsDelayedEvent
+  class DelayedEvent
   {
   public:
-    virtual ~nsDelayedEvent() {};
-    virtual void Dispatch(PresShell* aShell) {}
+    virtual ~DelayedEvent() { }
+    virtual void Dispatch() { }
   };
 
-  class nsDelayedInputEvent : public nsDelayedEvent
+  class DelayedInputEvent : public DelayedEvent
   {
   public:
-    virtual void Dispatch(PresShell* aShell)
-    {
-      if (mEvent && mEvent->widget) {
-        nsCOMPtr<nsIWidget> w = mEvent->widget;
-        nsEventStatus status;
-        w->DispatchEvent(mEvent, status);
-      }
-    }
+    virtual void Dispatch() MOZ_OVERRIDE;
 
   protected:
-    nsDelayedInputEvent()
-    : nsDelayedEvent(), mEvent(nullptr) {}
-
-    virtual ~nsDelayedInputEvent()
-    {
-      delete mEvent;
-    }
+    DelayedInputEvent();
+    virtual ~DelayedInputEvent();
 
     mozilla::WidgetInputEvent* mEvent;
   };
 
-  class nsDelayedMouseEvent : public nsDelayedInputEvent
+  class DelayedMouseEvent : public DelayedInputEvent
   {
   public:
-    nsDelayedMouseEvent(mozilla::WidgetMouseEvent* aEvent) :
-      nsDelayedInputEvent()
-    {
-      mozilla::WidgetMouseEvent* mouseEvent =
-        new mozilla::WidgetMouseEvent(aEvent->mFlags.mIsTrusted,
-                                      aEvent->message,
-                                      aEvent->widget,
-                                      aEvent->reason,
-                                      aEvent->context);
-      mouseEvent->AssignMouseEventData(*aEvent, false);
-      mEvent = mouseEvent;
-    }
+    DelayedMouseEvent(mozilla::WidgetMouseEvent* aEvent);
   };
 
-  class nsDelayedKeyEvent : public nsDelayedInputEvent
+  class DelayedKeyEvent : public DelayedInputEvent
   {
   public:
-    nsDelayedKeyEvent(mozilla::WidgetKeyboardEvent* aEvent) :
-      nsDelayedInputEvent()
-    {
-      mozilla::WidgetKeyboardEvent* keyEvent =
-        new mozilla::WidgetKeyboardEvent(aEvent->mFlags.mIsTrusted,
-                                         aEvent->message,
-                                         aEvent->widget);
-      keyEvent->AssignKeyEventData(*aEvent, false);
-      mEvent = keyEvent;
-    }
+    DelayedKeyEvent(mozilla::WidgetKeyboardEvent* aEvent);
   };
 
   // Check if aEvent is a mouse event and record the mouse location for later
@@ -759,7 +726,7 @@ protected:
   // Reflow roots that need to be reflowed.
   nsTArray<nsIFrame*>       mDirtyRoots;
 
-  nsTArray<nsAutoPtr<nsDelayedEvent> > mDelayedEvents;
+  nsTArray<nsAutoPtr<DelayedEvent> > mDelayedEvents;
   nsRevocableEventPtr<nsRunnableMethod<PresShell> > mResizeEvent;
   nsCOMPtr<nsITimer>        mAsyncResizeEventTimer;
 private: