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

chrome/browser/tab_contents/web_drag_source.cc

 // Copyright (c) 2006-2008 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.
 
 #if defined(OS_WIN)
 #include <atlbase.h>
 #include <atlapp.h>
 #include <atlmisc.h>
 #endif
 
@@ skipping 30 matching lines @@
   // when a NULL render_view_host is passed to us. I think this is what is
   // happening but it is hard to tell since the minidump is not helpful in this
   // case. At least we can then rule that out.
   CHECK(render_view_host_);
 }
 
 void WebDragSource::OnDragSourceCancel() {
   gfx::Point client;
   gfx::Point screen;
   GetCursorPositions(source_wnd_, &client, &screen);
-  render_view_host_->DragSourceEndedAt(client.x(), client.y(),
-                                       screen.x(), screen.y());
+  render_view_host_->DragSourceCancelledAt(client.x(), client.y(),
+                                           screen.x(), screen.y());
 }
 
 void WebDragSource::OnDragSourceDrop() {
   gfx::Point client;
   gfx::Point screen;
   GetCursorPositions(source_wnd_, &client, &screen);
   render_view_host_->DragSourceEndedAt(client.x(), client.y(),
                                        screen.x(), screen.y());
 }
 
 void WebDragSource::OnDragSourceMove() {
   gfx::Point client;
   gfx::Point screen;
   GetCursorPositions(source_wnd_, &client, &screen);
   render_view_host_->DragSourceMovedTo(client.x(), client.y(),
                                        screen.x(), screen.y());
 }