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

webkit/glue/webview_impl.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WEBKIT_GLUE_WEBVIEW_IMPL_H_
 #define WEBKIT_GLUE_WEBVIEW_IMPL_H_
 
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 77 matching lines @@
   virtual void SetPreferences(const WebPreferences& preferences);
   virtual const WebPreferences& GetPreferences();
   virtual void SetPageEncoding(const std::wstring& encoding_name);
   virtual std::wstring GetMainFrameEncodingName();
   virtual void ZoomIn(bool text_only);
   virtual void ZoomOut(bool text_only);
   virtual void ResetZoom();
   virtual void CopyImageAt(int x, int y);
   virtual void InspectElement(int x, int y);
   virtual void ShowJavaScriptConsole();
+  virtual void DragSourceCancelledAt(
+      const WebKit::WebPoint& client_point,
+      const WebKit::WebPoint& screen_point);
   virtual void DragSourceEndedAt(
       const WebKit::WebPoint& client_point,
       const WebKit::WebPoint& screen_point);
   virtual void DragSourceMovedTo(
       const WebKit::WebPoint& client_point,
       const WebKit::WebPoint& screen_point);
   virtual void DragSourceSystemDragEnded();
   virtual bool DragTargetDragEnter(
       const WebKit::WebDragData& drag_data, int identity,
       const WebKit::WebPoint& client_point,
@@ skipping 243 matching lines @@
   static const WebKit::WebInputEvent* current_input_event() {
     return g_current_input_event;
   }
 private:
   static const WebKit::WebInputEvent* g_current_input_event;
 
   DISALLOW_COPY_AND_ASSIGN(WebViewImpl);
 };
 
 #endif  // WEBKIT_GLUE_WEBVIEW_IMPL_H_