Make the cancelling of drag and drop match Safari for Windows.

webkit/glue/webview_impl.cc

 /*
 * Copyright 2007 Google Inc. All Rights Reserved.
 *
 * Portions Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
 *
 * ***** BEGIN LICENSE BLOCK *****
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
@@ skipping 1519 matching lines @@
       return;
 
     page_->inspectorController()->inspect(result.innerNonSharedNode());
   }
 }
 
 void WebViewImpl::ShowJavaScriptConsole() {
   page_->inspectorController()->showPanel(InspectorController::ConsolePanel);
 }
 
+void WebViewImpl::DragSourceCancelledAt(
+    const WebPoint& client_point,
+    const WebPoint& screen_point) {
+  PlatformMouseEvent pme(webkit_glue::WebPointToIntPoint(client_point),
+                         webkit_glue::WebPointToIntPoint(screen_point),
+                         NoButton, MouseEventMoved, 0, false, false, false,
+                         false, 0);
+  page_->mainFrame()->eventHandler()->dragSourceEndedAt(pme, DragOperationNone);
+}
+
 void WebViewImpl::DragSourceEndedAt(
     const WebPoint& client_point,
     const WebPoint& screen_point) {
   PlatformMouseEvent pme(webkit_glue::WebPointToIntPoint(client_point),
                          webkit_glue::WebPointToIntPoint(screen_point),
-                         NoButton, MouseEventMoved, 0, false, false, false,
+                         LeftButton, MouseEventMoved, 0, false, false, false,
                          false, 0);
   page_->mainFrame()->eventHandler()->dragSourceEndedAt(pme, DragOperationCopy);
 }
 
 void WebViewImpl::DragSourceMovedTo(
     const WebPoint& client_point,
     const WebPoint& screen_point) {
   PlatformMouseEvent pme(webkit_glue::WebPointToIntPoint(client_point),
                          webkit_glue::WebPointToIntPoint(screen_point),
                          LeftButton, MouseEventMoved, 0, false, false, false,
@@ skipping 313 matching lines @@
 
   return document->focusedNode();
 }
 
 HitTestResult WebViewImpl::HitTestResultForWindowPos(const IntPoint& pos) {
   IntPoint doc_point(
       page_->mainFrame()->view()->windowToContents(pos));
   return page_->mainFrame()->eventHandler()->
       hitTestResultAtPoint(doc_point, false);
 }