Merge revision 655 changes:

- Windows: Delay destroying the browser window until pending drag operations have completed (issue #610).
- Revert: Windows: Reset the window procedure in the WebWidgetHost destructor to avoid crashes if messages are delivered after the window is destroyed.

git-svn-id: https://chromiumembedded.googlecode.com/svn/branches/1025@656 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/browser_drag_delegate_win.cc

@@ -127,7 +127,9 @@ void BrowserDragDelegate::StartDragging(const WebDropData& drop_data,
   // If it is not drag-out, do the drag-and-drop in the current UI thread.
   if (drop_data.download_metadata.empty()) {
     DoDragging(drop_data, ops, page_url, page_encoding, image, image_offset);
-    EndDragging(false);
+    CefThread::PostTask(
+        CefThread::UI, FROM_HERE,
+        base::Bind(&BrowserDragDelegate::EndDragging, this, false));
     return;
   }