Implement DragEvent and move MouseEvent.dataTransfer

Source/core/input/EventHandler.cpp

Index: Source/core/input/EventHandler.cpp
diff --git a/Source/core/input/EventHandler.cpp b/Source/core/input/EventHandler.cpp
index 04ea9c7ca66c2dff45ccfb07649c78b4a48899a2..91e3475d2a44e365d4d8177f4ab99fd5b85e2c23 100644
--- a/Source/core/input/EventHandler.cpp
+++ b/Source/core/input/EventHandler.cpp
@@ -40,6 +40,7 @@
 #include "core/editing/Editor.h"
 #include "core/editing/FrameSelection.h"
 #include "core/editing/SelectionController.h"
+#include "core/events/DragEvent.h"
 #include "core/events/EventPath.h"
 #include "core/events/KeyboardEvent.h"
 #include "core/events/MouseEvent.h"
@@ -1278,12 +1279,26 @@ bool EventHandler::dispatchDragEvent(const AtomicString& eventType, Node* dragTa
     if (!view)
         return false;
 
-    RefPtrWillBeRawPtr<MouseEvent> me = MouseEvent::create(eventType,
-        true, true, m_frame->document()->domWindow(),
-        0, event.globalPosition().x(), event.globalPosition().y(), event.position().x(), event.position().y(),
-        event.movementDelta().x(), event.movementDelta().y(),
-        event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(),
-        0, MouseEvent::platformModifiersToButtons(event.modifiers()), nullptr, dataTransfer, false, event.syntheticEventType(), event.timestamp());
+    DragEventInit dragEventInit;
+    dragEventInit.setBubbles(true);
+    dragEventInit.setCancelable(true);
+    dragEventInit.setView(m_frame->document()->domWindow());
+    dragEventInit.setDetail(0);
+    dragEventInit.setScreenX(event.globalPosition().x());
+    dragEventInit.setScreenY(event.globalPosition().y());
+    dragEventInit.setMovementX(event.movementDelta().x());
+    dragEventInit.setMovementY(event.movementDelta().y());
+
+    dragEventInit.setCtrlKey(event.ctrlKey());
+    dragEventInit.setShiftKey(event.shiftKey());
+    dragEventInit.setAltKey(event.altKey());
+    dragEventInit.setMetaKey(event.metaKey());
+
+    dragEventInit.setButton(0);
+    dragEventInit.setButtons(MouseEvent::platformModifiersToButtons(event.modifiers()));
+    dragEventInit.setDataTransfer(dataTransfer);
+
+    RefPtrWillBeRawPtr<DragEvent> me = DragEvent::create(eventType, dragEventInit);
 
     dragTarget->dispatchEvent(me.get());
     return me->defaultPrevented();